I'm attempting to give users a choice of customized UIs when they login. One will be a standard Gnome session. The other would be a custom UI. I'm not sure if its possible to base the custom UI off of Gnome at the same time or if it would be easier to use a separate desktop environment like KDE or XFCE and then customize it.
In any case the first hurdle is getting adding a new session to the login menu. Most desktop environments create one when their installed so going this route will create one automatically. If I try to reuse Gnome for the custom session I'll need to learn how to create a new session entry manually.
Anyone have any ideas?