A few of those distro versions are too old for your hardware.The ATI vid card has several chipset versions and they're not all supported by Linux(
look at this ).I know this 1st hand because I have a comp running Linux with this card and it works great and I had another comp with the same card(diff. chipset ver)that would not run X for anything.

If you have a 2 hdd system then there are also bootloader issues to contend with.
I'm almost sure this is a minor hardware problem that can be worked out.
What is your current working OS? Win2K,XP?
lynch