Quick update on this - I've loaded XP using debug mode (yeah, I know what you're thinking
) & the prob appears to be a conflict issue - error message is MACHINE_CHECK_EXCEPTION with the error code 0x0000009c (0x00000004, 0x00000000, 0xB2000000, 0x00070F0F). Means bugger all to me, but I hope someone will be able to help