Thanks very much for your help, really appreciated.
I'm going to re-install a fresh copy of the snow leopard DVD onto the hard drive, and then from scratch install just the updated chameleon loader you sent me a link to.
Then work on it from there and see what happens. If anyone else has got a maximus formula II board working I would really appreciate the help!
EDIT - FIRST ATTEMPT
Well I re-installed SL to my external HD, booted it up using macbook laptop. From there I uploaded the DSDT.aml in the tutorial too the root, installed the new chameleon boot loader you linked me too. Didn't paste any of the extra kexts suppled though.
I then edited the boot.plist so that it's GraphicEnabler=yes.
From there plugged the hard drive into my desktop PC, booted up and loaded the chameleon boot loader, I then tried to boot with -x32 -v -x and just -v, both kernal panicked with the following errors:
-x32 -v -x... KP = IOAPIC: Version 0x20 Vectors 64:87
-v... KP = Using PCI-Root-UID Value: 0
Don't know how to get around these errors, I currently have no extra kexts installed like I previously did on the last install. If I can't get it fixed soon I might just install 10.5.7.