Recently, I downloaded Variable Geo Custom, but I've been having problems with it. The game plays, but all the colours are distorted, and even worse I can't get decent controls for the thing. The keyboard is uncomfortable to use, and any attempt to try and use a pad fails miserably. So far I've had the game repeatedly register a button press that doesn't occur so that it endlessly cycles through menus, or only register one button press per directional axis(so that it recognises left and up, but not down or right). The pads that I've used are a converter to use a playstation pad, a converter to use a Saturn pad, and a PC joypad.
The only problem that I could really guess at, would be that maybe it's not compatible with Windows Vista.
Anyway, here's the version that I downloaded, in case anyone wants to try it for themself.
http://rapidshare.com/files/106879471/vgcustom.zip.htmlIt's about 50MB, but once extracted becomes about 200.