You my friend are an absolute legend! That worked flawlessly!
I've not had a chance to try it out properly as I've had family commitments today but it definitely runs which is exactly what I was looking for!
One other question for you though, is there a widescreen option? I have a 27" iMac and in the standard settings it runs kinda windowed for a normal screen, it would be awesome to get it proper full screen if such an option is available!
Re my cabinet, I actually bought it from a friend who was moving abroad, it was a self build though, he pulled some plans from the internet and actually made the cabinet out of MDF along with a friends help, it contains a shuttle PC which is a dual core and runs MAME, Model 2, Daphne, ALG, N64, SNES, NES, Gameboy, Megadrive/Genesis, 32X, Mastersystem, PC Engine and a few others, it uses Hyperspjn as a front end and is flawless at running all of them, I did originally try to put Supermodel on it as well but it wasn't quite up to the job, luckily my new iMac is powerful enough to do it without breaking a sweat!
Once again I can't thank you enough for your help, I really do appreciate it!