I know I can ctrl+alt+enter to change a fullscreen rdesktop session into a window'ed one, but I'd like to know if it's possible to switch workspaces (usually ctrl+alt+left or right) while rdesktop is in fullscreen (-f) mode?

I've read rumors about people who have gotten Compiz Fusion's 3D Cube to rotate while rdesktop was in full screen but I can't see how, because I don't have Compiz enabled and I can't even switch workspaces let alone the 3D cube.

Also I found this Youtube video:Ubuntu + Compiz Fusion + Seamless RDP
How did he do this w/ rdesktop?

Thanks in advance.
-BassKozz