seems there's no way to avoid heavy scripting and a lot of hidden labels (going along with higher memory usage)... :(
it's a pity, everything would have been so comfortable and easy... :(

RabidCow: i noticed SkinBoxTile seems not to work. whether i set it false or true, the image was always tiled.

ah, and btw: i suppose you cannot hook modules from one box to another at runtime?