SirPeale, thanks so much for the response. My bad for not checking this board sooner.
I just tried it, and it changes the display settings (turned split screen, high res) and games no longer load once selected.... luckily I did as you advised and kept the original arcadeos.cfg

So I'm back to square one.... My bootdisks don't work so a complete restore won't be happening.
The only settings I want to change are the JOYSTICK config, as far as Im aware these are only modifiable once a game is loaded. Then you can change individual GAME CONFIG and ALL GAMES CONFIG, is there a way to reset just this??
If not, what other solution would you use?
Tks again, Cedric