"Does anyone know to to set it to for example 720x500 or so?"
Isn't it just to type in whatever value you want in the graphics box? I think I run 320*240 or something similar and choosing "fullscreen" and "fullscreen RTG" or something and I get a fullscreen with my Amiga500 setup.
got to check my WinUAE config later and see what I really had.
