diff --git a/examples/demo/modules/demo/cms_demo_module.e b/examples/demo/modules/demo/cms_demo_module.e
index 25af681..85cb11f 100644
--- a/examples/demo/modules/demo/cms_demo_module.e
+++ b/examples/demo/modules/demo/cms_demo_module.e
@@ -77,7 +77,7 @@ CREATE TABLE tb_demo(
 						api.logger.put_error ("Could not initialize database for demo module", generating_type)
 					end
 				end
-				api.storage.set_custom_value ("is_initialized", "module-" + name, "yes")
+				Precursor {CMS_MODULE}(api)
 			end
 		end
 
diff --git a/src/configuration/cms_setup.e b/src/configuration/cms_setup.e
index b7ceb1d..941f12b 100644
--- a/src/configuration/cms_setup.e
+++ b/src/configuration/cms_setup.e
@@ -23,6 +23,8 @@ feature -- Access
 			Result := environment
 		end
 
+feature {CMS_API} -- API Access		
+
 	enabled_modules: CMS_MODULE_COLLECTION
 			-- List of enabled modules.
 		local
@@ -51,7 +53,14 @@ feature -- Access
 			only_enabled_modules: across Result as ic all ic.item.is_enabled end
 		end
 
-feature {CMS_MODULE, CMS_API} -- Restricted access
+feature {CMS_MODULE, CMS_API, CMS_SETUP_ACCESS} -- Restricted access
+
+	modules: CMS_MODULE_COLLECTION
+			-- List of available modules.
+		deferred
+		end
+
+feature {NONE} -- Implementation: update		
 
 	update_module_status_within (a_module: CMS_MODULE; a_collection: CMS_MODULE_COLLECTION)
 			-- Update status of module `a_module', taking into account its dependencies within the collection `a_collection'.
@@ -101,11 +110,6 @@ feature {CMS_MODULE, CMS_API} -- Restricted access
 			end
 		end
 
-	modules: CMS_MODULE_COLLECTION
-			-- List of available modules.
-		deferred
-		end
-
 feature -- Access: Site
 
 	site_id: READABLE_STRING_8
diff --git a/src/configuration/cms_setup_access.e b/src/configuration/cms_setup_access.e
new file mode 100644
index 0000000..6f34cf6
--- /dev/null
+++ b/src/configuration/cms_setup_access.e
@@ -0,0 +1,12 @@
+note
+	description: "Interface to access restricted data from {CMS_SETUP}."
+	date: "$Date$"
+	revision: "$Revision$"
+
+deferred class
+	CMS_SETUP_ACCESS
+
+note
+	copyright: "2011-2015, Jocelyn Fiat, Javier Velilla, Eiffel Software and others"
+	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
+end
diff --git a/src/service/cms_access.e b/src/service/cms_access.e
new file mode 100644
index 0000000..693f9ab
--- /dev/null
+++ b/src/service/cms_access.e
@@ -0,0 +1,15 @@
+note
+	description: "Interface giving access to internal CMS features."
+	date: "$Date$"
+	revision: "$Revision$"
+
+deferred class
+	CMS_ACCESS
+
+inherit
+	CMS_SETUP_ACCESS
+
+note
+	copyright: "2011-2015, Jocelyn Fiat, Javier Velilla, Eiffel Software and others"
+	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
+end
diff --git a/src/service/cms_api.e b/src/service/cms_api.e
index 46de650..964221a 100644
--- a/src/service/cms_api.e
+++ b/src/service/cms_api.e
@@ -34,6 +34,8 @@ feature {NONE} -- Initialize
 				-- Initialize the persitent layer.
 		local
 			l_module: CMS_MODULE
+			l_enabled_modules: CMS_MODULE_COLLECTION
+			l_uninstalled_mods: detachable ARRAYED_LIST [CMS_MODULE]
 		do
 				-- Initialize formats.
 			initialize_formats
@@ -45,22 +47,40 @@ feature {NONE} -- Initialize
 				create {CMS_STORAGE_NULL} storage
 			end
 
+				-- Keep enable modules list.
+			l_enabled_modules := setup.enabled_modules
+			enabled_modules := l_enabled_modules
+
 				-- Complete storage setup.
 			storage.set_api (Current)
 
 				-- Initialize enabled modules.
 			across
-				setup.enabled_modules as ic
+				l_enabled_modules as ic
 			loop
 				l_module := ic.item
 					-- FIXME: should we initialize first, and then install
 					-- or the reverse, or merge installation and initialization
 					-- and leave the responsability to the module to know
 					-- if this is installed or not...
-				if not l_module.is_installed (Current) then
-					l_module.install (Current)
+--				if not l_module.is_installed (Current) then
+--					l_module.install (Current)
+--				end
+				if l_module.is_installed (Current) then
+					l_module.initialize (Current)
+				else
+					if l_uninstalled_mods = Void then
+						create l_uninstalled_mods.make (1)
+					end
+					l_uninstalled_mods.force (l_module)
+				end
+			end
+			if l_uninstalled_mods /= Void then
+				across
+					l_uninstalled_mods as ic
+				loop
+					l_enabled_modules.remove (ic.item)
 				end
-				l_module.initialize (Current)
 			end
 		end
 
@@ -81,6 +101,30 @@ feature {NONE} -- Initialize
 			formats.extend (f)
 		end
 
+feature {CMS_ACCESS} -- Installation		
+
+	install
+			-- Install CMS or uninstalled module which are enabled.
+		local
+			l_module: CMS_MODULE
+		do
+			across
+				setup.modules as ic
+			loop
+				l_module := ic.item
+					-- FIXME: should we initialize first, and then install
+					-- or the reverse, or merge installation and initialization
+					-- and leave the responsability to the module to know
+					-- if this is installed or not...
+				if not l_module.is_installed (Current) then
+					l_module.install (Current)
+					if l_module.is_enabled then
+						l_module.initialize (Current)
+					end
+				end
+			end
+		end
+
 feature -- Access
 
 	setup: CMS_SETUP
@@ -197,6 +241,14 @@ feature -- Permissions system
 
 feature -- Query: module
 
+	is_module_installed (a_module: CMS_MODULE): BOOLEAN
+			-- Is `a_module' installed?
+		do
+			Result := a_module.is_installed (Current)
+		end
+
+	enabled_modules: CMS_MODULE_COLLECTION
+
 	module (a_type: TYPE [CMS_MODULE]): detachable CMS_MODULE
 			-- Enabled module typed `a_type', if any.
 			--| usage: if attached module ({FOO_MODULE}) as mod then ...
diff --git a/src/service/cms_execution.e b/src/service/cms_execution.e
index e0699e4..d15d749 100644
--- a/src/service/cms_execution.e
+++ b/src/service/cms_execution.e
@@ -44,7 +44,7 @@ feature {NONE} -- Initialization
 			setup_storage (l_setup)
 			setup_modules (l_setup)
 			create api.make (l_setup)
-			modules := setup.enabled_modules
+			modules := api.enabled_modules
 
 			initialize_cms
 			Precursor
@@ -66,7 +66,7 @@ feature {NONE} -- Initialization
 	initialize_modules
 			-- Intialize modules and keep only enabled modules.
 		do
-			modules := setup.enabled_modules
+			modules := api.enabled_modules
 		ensure
 			only_enabled_modules: across modules as ic all ic.item.is_enabled end
 		end
@@ -118,6 +118,7 @@ feature -- Settings: router
 		local
 			l_api: like api
 			l_router: like router
+			l_module: CMS_MODULE
 		do
 			api.logger.put_debug (generator + ".setup_router", Void)
 				-- Configure root of api handler.
@@ -130,7 +131,10 @@ feature -- Settings: router
 			across
 				modules as ic
 			loop
-				ic.item.setup_router (l_router, l_api)
+				l_module := ic.item
+				if l_module.is_initialized then
+					l_module.setup_router (l_router, l_api)
+				end
 			end
 				-- Configure files handler.
 			configure_api_file_handler (l_router)
@@ -148,6 +152,8 @@ feature -- Settings: router
 			a_router.handle ("/", l_root_handler, l_methods)
 			a_router.handle ("", l_root_handler, l_methods)
 			map_uri_agent ("/favicon.ico", agent handle_favicon, a_router.methods_head_get)
+
+			map_uri ("/admin/install", create {CMS_ADMIN_INSTALL_HANDLER}.make (api), a_router.methods_head_get)
 		end
 
 	configure_api_file_handler (a_router: WSF_ROUTER)
diff --git a/src/service/cms_module.e b/src/service/cms_module.e
index 7b864b8..1791353 100644
--- a/src/service/cms_module.e
+++ b/src/service/cms_module.e
@@ -86,14 +86,14 @@ feature {CMS_API} -- Module management
 		require
 			is_not_installed: not is_installed (api)
 		do
-			api.storage.set_custom_value ("is_initialized", "module-" + name, "yes")
+			api.storage.set_custom_value ("is_initialized", "yes", "module-" + name)
 		end
 
 	uninstall (api: CMS_API)
 		require
 			is_installed: is_installed (api)
 		do
-			api.storage.set_custom_value ("is_initialized", "module-" + name, "no")
+			api.storage.set_custom_value ("is_initialized", "no", "module-" + name)
 		end
 
 feature -- Router
diff --git a/src/service/handler/cms_admin_install_handler.e b/src/service/handler/cms_admin_install_handler.e
new file mode 100644
index 0000000..3ca2744
--- /dev/null
+++ b/src/service/handler/cms_admin_install_handler.e
@@ -0,0 +1,80 @@
+note
+	description: "Handler to process CMS installation process."
+	date: "$Date: 2015-02-13 13:08:13 +0100 (ven., 13 févr. 2015) $"
+	revision: "$Revision: 96616 $"
+
+class
+	CMS_ADMIN_INSTALL_HANDLER
+
+inherit
+	CMS_HANDLER
+
+	WSF_URI_HANDLER
+		rename
+			new_mapping as new_uri_mapping
+		end
+
+	WSF_RESOURCE_HANDLER_HELPER
+		redefine
+			do_get
+		end
+
+	CMS_ACCESS
+
+	REFACTORING_HELPER
+
+create
+	make
+
+feature -- execute
+
+	execute (req: WSF_REQUEST; res: WSF_RESPONSE)
+			-- Execute request handler
+		do
+			execute_methods (req, res)
+		end
+
+feature -- HTTP Methods
+
+	do_get (req: WSF_REQUEST; res: WSF_RESPONSE)
+			-- <Precursor>
+		local
+			r: CMS_RESPONSE
+			l_module: CMS_MODULE
+			s: STRING
+			lst: ARRAYED_LIST [CMS_MODULE]
+		do
+			create {GENERIC_VIEW_CMS_RESPONSE} r.make (req, res, api)
+			r.set_title (r.translation ("CMS Installation ...", Void))
+			create s.make_from_string ("<h1>Modules</h1><ul>")
+			create lst.make (1)
+			across
+				api.setup.modules as ic
+			loop
+				l_module := ic.item
+				if api.is_module_installed (l_module) then
+					s.append ("<li>" + l_module.name + " is already installed.</li>%N")
+				else
+					lst.force (l_module)
+				end
+			end
+			api.install
+			across
+				lst as ic
+			loop
+				l_module := ic.item
+				if api.is_module_installed (l_module) then
+					s.append ("<li>" + l_module.name + " was successfully installed.</li>%N")
+				else
+					s.append ("<li>" + l_module.name + " could not be installed!</li>%N")
+				end
+			end
+			s.append ("</ul>")
+			r.set_main_content (s)
+			r.execute
+		end
+
+note
+	copyright: "2011-2015, Jocelyn Fiat, Javier Velilla, Eiffel Software and others"
+	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
+end
diff --git a/src/service/response/cms_response.e b/src/service/response/cms_response.e
index a0f3797..1c62728 100644
--- a/src/service/response/cms_response.e
+++ b/src/service/response/cms_response.e
@@ -71,7 +71,7 @@ feature {NONE} -- Initialization
 			l_module: CMS_MODULE
 			l_enabled_modules: CMS_MODULE_COLLECTION
 		do
-			l_enabled_modules := setup.enabled_modules
+			l_enabled_modules := api.enabled_modules
 			across
 				l_enabled_modules as ic
 			loop