you can't put a snap anywhere you want on the screen. YOu need to pick which one of the layouts you want. I choose the FULL SCREEN layout and made the snaps by hand. This way, then you can put an image anywhere. You can make different backgrounds if you want to also. Just think about it being just ONE SNAP but you modified the snap the way you want it to look.
To do this in the rc file
mode full
mode_skip list full_mixed list_mixed tile_small tile_normal tile_big tile_enormous tile_giant tile_icon
I skip everything except for the FULL SCREEN MODE.
At one point I made the GAME SNAP inside my CABINET snap moving pictures but it took a long time to do it. So when you look at the FULL SNAP, the snap within the cabinet is an actual play. i ditch that cause it would take alot of time but it was a GREAT idea. Now I just have to button to switch between the FULL SCREEN MNG and the Menu SNAP.