Firstly, for the skinning, i don't suppose there is an easy (or possible) way to do this using style sheets.
Why not? its just one simple Stylesheet syntax line... (setting the background image)

For buttons, why do you even bother with fonts?
You usually don't have that many buttons, so making an image (with the text) per button is probably far quicker than investing the trouble of doing it with fonts.
Unless you are doing it for the sport, that I can understand.

It would be cool if there was already a 3rd party GUI library for Qt, like wysota's widgets, but geared more towards games (that is, can use bitmap skins and fonts).
Have you seen Qt3D?
http://doc.qt.nokia.com/qt3d-snapsho...-painting.html