Ok, I just ran a test and I seemed to have less errors with the code generated by the Fanuc control than the Mach3.
I have attached the Mach3 MasterCam x6 machine definition and post, and also noted the Shopbot Mastercam x7 machine definition and post origins**, for anyone interested in it.
Thanks again everyone for your help, I'll update this thread if I make any breakthroughs.
Aaron
**http://www.patongroup.com/downloads.html