An addon that allows GMod to mount a few very popular mods

In GMod, on the first menu, you get the option of mounting various valve games, so would it be possible to change the menu, so it allowed you to mount a few popular mods, that had alot of cutom content?

Just an idea, I’m not even sure if it’s possible.

http://www.facepunch.com/showthread.php?t=771205 ?

That says it doesn’t work…