Coz - I haven't seen this one in your registry hacks.. and I think it's the most important -
http://www.spbclub.com/forum/viewtopic.php?t=24155
To allow adding icons to the menus:
Go to: HKLM\Software\SPB Software House 2\Spb Mobile Shell\Menu\Root
You will see a key (folder) for each of the menus.
If you go into 'My Shortcuts' you will notice it has a DWord called Add set to true (1).
Go back up and create this same Dword in each of the other keys (folders).
Now when you go back into the menus and tap the bottom right arrow you will see you now have the 'add' options!
If you want to remove a subfolder (for example Media Player from the Multimedia menu) just go into the Multimedia key in the registry and delete the 'Media Player' key altogether.