Android :: Adding His Application To The Add To Home Screen - Shortcut Section

In my android application, I create shortcuts by code to some activities within my application. I do this feature by using the broadcast:

intent.setAction("com.android.launcher.action.INSTALL_SHORTCUT");sendBroadcast(intent);

And that's cool, that really work!

Now I would like to do something different: I have seen that some actions can "register" somewhere to be added in the Android menu, when you long press on the Home like this one:

http://www.androidtapp.com/wp-content/uploads/2010/02/UltimateFaves-Add-Home-Screen-Shortcut.jpg

So my main question is the next one:

How is that possible to register for this menu. I guess there is some line to add in the manifest, but cannot see where to do that!

There is a secondary question: once i will have succeed doing that, may I add a different number of shortcuts in my menu ( imagine That I would like to do that for a multi-account twitter client, I would like to see a different for each twitter account in this list.) So the number of shortcut is programmaticaly computed.