diff --git a/addons/base_setup/base_setup_installer.xml b/addons/base_setup/base_setup_installer.xml
index 155e934de5f..5419e5d6590 100644
--- a/addons/base_setup/base_setup_installer.xml
+++ b/addons/base_setup/base_setup_installer.xml
@@ -24,17 +24,17 @@ If you don't think you need any of these right now, you can easily install them
             <attribute name="string">Install Generic Modules</attribute>
           </separator>
           <group colspan="8">
-            <field name="crm"/> <field name="sale"/>
-            <field name="project"/> <field name="knowledge"/>
-            <field name="stock"/> <field name="mrp"/>
-            <field name="account"/> <field name="purchase"/>
-            <field name="hr"/> <field name="point_of_sale" groups="base.group_extended"/>
-            <field name="marketing" groups="base.group_extended"/> <field name="misc_tools"/>
-            <field name="report_designer" groups="base.group_extended"/>
+            <field name="crm" on_change="onchange_moduleselection(crm,sale,project,knowledge,stock,mrp,account,purchase,hr,point_of_sale,marketing,misc_tools,report_designer,profile_association,profile_auction,profile_bookstore)"/> <field name="sale" on_change="onchange_moduleselection(crm,sale,project,knowledge,stock,mrp,account,purchase,hr,point_of_sale,marketing,misc_tools,report_designer,profile_association,profile_auction,profile_bookstore)"/>
+            <field name="project" on_change="onchange_moduleselection(crm,sale,project,knowledge,stock,mrp,account,purchase,hr,point_of_sale,marketing,misc_tools,report_designer,profile_association,profile_auction,profile_bookstore)"/> <field name="knowledge" on_change="onchange_moduleselection(crm,sale,project,knowledge,stock,mrp,account,purchase,hr,point_of_sale,marketing,misc_tools,report_designer,profile_association,profile_auction,profile_bookstore)"/>
+            <field name="stock" on_change="onchange_moduleselection(crm,sale,project,knowledge,stock,mrp,account,purchase,hr,point_of_sale,marketing,misc_tools,report_designer,profile_association,profile_auction,profile_bookstore)"/> <field name="mrp" on_change="onchange_moduleselection(crm,sale,project,knowledge,stock,mrp,account,purchase,hr,point_of_sale,marketing,misc_tools,report_designer,profile_association,profile_auction,profile_bookstore)"/>
+            <field name="account" on_change="onchange_moduleselection(crm,sale,project,knowledge,stock,mrp,account,purchase,hr,point_of_sale,marketing,misc_tools,report_designer,profile_association,profile_auction,profile_bookstore)"/> <field name="purchase" on_change="onchange_moduleselection(crm,sale,project,knowledge,stock,mrp,account,purchase,hr,point_of_sale,marketing,misc_tools,report_designer,profile_association,profile_auction,profile_bookstore)"/>
+            <field name="hr" on_change="onchange_moduleselection(crm,sale,project,knowledge,stock,mrp,account,purchase,hr,point_of_sale,marketing,misc_tools,report_designer,profile_association,profile_auction,profile_bookstore)"/> <field name="point_of_sale" on_change="onchange_moduleselection(crm,sale,project,knowledge,stock,mrp,account,purchase,hr,point_of_sale,marketing,misc_tools,report_designer,profile_association,profile_auction,profile_bookstore)" groups="base.group_extended"/>
+            <field name="marketing" on_change="onchange_moduleselection(crm,sale,project,knowledge,stock,mrp,account,purchase,hr,point_of_sale,marketing,misc_tools,report_designer,profile_association,profile_auction,profile_bookstore)" groups="base.group_extended"/> <field name="misc_tools" on_change="onchange_moduleselection(crm,sale,project,knowledge,stock,mrp,account,purchase,hr,point_of_sale,marketing,misc_tools,report_designer,profile_association,profile_auction,profile_bookstore)"/>
+            <field name="report_designer" groups="base.group_extended" on_change="onchange_moduleselection(crm,sale,project,knowledge,stock,mrp,account,purchase,hr,point_of_sale,marketing,misc_tools,report_designer,profile_association,profile_auction,profile_bookstore)"/>
             <separator string="Install Specific Business Modules" colspan="4"/>
-            <field name="profile_association"/>
-            <field name="profile_auction"/>
-            <field name="profile_bookstore"/>
+            <field name="profile_association" on_change="onchange_moduleselection(crm,sale,project,knowledge,stock,mrp,account,purchase,hr,point_of_sale,marketing,misc_tools,report_designer,profile_association,profile_auction,profile_bookstore)"/>
+            <field name="profile_auction" on_change="onchange_moduleselection(crm,sale,project,knowledge,stock,mrp,account,purchase,hr,point_of_sale,marketing,misc_tools,report_designer,profile_association,profile_auction,profile_bookstore)"/>
+            <field name="profile_bookstore" on_change="onchange_moduleselection(crm,sale,project,knowledge,stock,mrp,account,purchase,hr,point_of_sale,marketing,misc_tools,report_designer,profile_association,profile_auction,profile_bookstore)"/>
           </group>
         </data>
       </field>
diff --git a/addons/base_setup/installer.py b/addons/base_setup/installer.py
index e38e2009e75..5b6bd4107f0 100644
--- a/addons/base_setup/installer.py
+++ b/addons/base_setup/installer.py
@@ -91,6 +91,11 @@ class base_setup_installer(osv.osv_memory):
         'crm': True,
         }
 
+
+    def onchange_moduleselection(self, cr, uid, ids, *args):
+        progress = self._progress(cr, uid) - (2.5 * len(filter(lambda x: x==1, args)))
+        return {'value':{'progress':progress}}
+
     def modules_to_install(self, cr, uid, ids, context=None):
         modules = super(base_setup_installer, self).modules_to_install(cr, uid, ids, context=context)
         interface_id = self.pool.get('res.config.view').search(cr, uid, [])