Thanks for your help. I'm going to try in an hour. I tried on my gigabyte ep31-ds3l and it just gave me 'A disk error occurred'. The device boots fine when connected to a Sata port on the mobo, as normal. But it gives me that error when connected to a IDE port through the connector..
I didn't bother checking to see if I was set to AHCI mode or not though and I didn't check to put the CD drive as the first boot device which apparently can skip any bs with the drive in a few cases.
Any other help is appreciated.