X under Linux
I'm not a Linux user myself, preferring FreeBSD or NetBSD (which both support XFree86), however that should be pretty similar for XFree86 on Linux.
First of all, I would second Dagger Dirk
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The graphics card is the problem most probably: X-Window may not support it. The easiest thing to do is to NOT install X-Window during the redhat/suse install.
Then once the machine *is* installed, you can find a guide to manually troubleshoot X-Window.
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Definitely! Once the base OS is installed OK, then start on X :-)
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I'll just bet it's some weird graphics card no-one's ever heard of.
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Possibly -- there are an awful lot of permutations of video cards out there, and as it says in the docs., a "Wibble-32" card and a "Wibble-32/a" card may appear to be very similar, but can, in fact, be about as different in hardware terms as you can get.
Can you post details of what video card you've got, and I'll see if I can help further.