diff --git a/doc/INSTALL b/doc/INSTALL
index e653acb1..61d85f1c 100644
--- a/doc/INSTALL
+++ b/doc/INSTALL
@@ -37,7 +37,7 @@ Supported databases:
    It will create tables and an administrator account.
 
 5. Insert default configuration data in database:
-   rake load_default_data RAILS_ENV="production"
+   rake redmine:load_default_data RAILS_ENV="production"
    It will load default roles, trackers, statuses, workflows and enumerations.
    This step is optional (but recommended), as you can define your
    own configuration from sratch.
diff --git a/lib/tasks/deprecated.rake b/lib/tasks/deprecated.rake
new file mode 100644
index 00000000..dca43ddc
--- /dev/null
+++ b/lib/tasks/deprecated.rake
@@ -0,0 +1,9 @@
+def deprecated_task(name, new_name)
+  task name=>new_name do 
+    $stderr.puts "\nNote: The rake task #{name} has been deprecated, please use the replacement version #{new_name}"
+  end
+end
+
+deprecated_task :load_default_data, "redmine:load_default_data"
+deprecated_task :migrate_from_mantis, "redmine:migrate_from_mantis"
+deprecated_task :migrate_from_trac, "redmine:migrate_from_trac"
diff --git a/lib/tasks/load_default_data.rake b/lib/tasks/load_default_data.rake
index e59c3c5f..21ea238b 100644
--- a/lib/tasks/load_default_data.rake
+++ b/lib/tasks/load_default_data.rake
@@ -1,5 +1,6 @@
-desc 'Load default configuration data'
+desc 'Load Redmine default configuration data'
 
+namespace :redmine do
 task :load_default_data => :environment do
   include GLoc
   set_language_if_valid('en')
@@ -163,4 +164,5 @@ rescue => error
   puts "Error: " + error
   puts "Default configuration data can't be loaded."
 end
-end
\ No newline at end of file
+end
+end
diff --git a/lib/tasks/migrate_from_mantis.rake b/lib/tasks/migrate_from_mantis.rake
index e7c1afd9..fff668b6 100644
--- a/lib/tasks/migrate_from_mantis.rake
+++ b/lib/tasks/migrate_from_mantis.rake
@@ -21,6 +21,7 @@ require 'active_record'
 require 'iconv'
 require 'pp'
 
+namespace :redmine do
 task :migrate_from_mantis => :environment do
   
   module MantisMigrate
@@ -483,3 +484,4 @@ task :migrate_from_mantis => :environment do
   MantisMigrate.establish_connection db_params
   MantisMigrate.migrate
 end
+end