Maybe this will do what you want ... at the top of the project overview window, the 4th button (looks like a green plus sign with a star behind it) is "Insert introductory media". Use this to select a media clip that will be played as soon as the disc is inserted before going to the main menu.
You know, for some reason I can't get ctrl-Q or ctrl-shift-Q to do anything. It's just as easy to insert things manually through the menus, but I wonder why they don't function.