Sure you can. First do a "rpm -qa | grep XFree" and then "rpm -e" each of them, of course there will be a *lot* of screaming about dependency problems if you remove it (i.e. KDE needs it, Gnome needs it etc). You can also use the graphical RPM manager if you are more comfortable with it. There are a couple of ways to get around that. One is to remove all the packages that depend on X and the other is to add the "--force" option. Changing out X and installing from the XFree site can be challenging if you've never done it.
Also, there are a couple of companies that produce Accelerated X servers at a fairly hefty price (MetroX for instance). I believe they have a trial download. You might try it just to see if it behaves the same way. Also, did you search the web site of the chipset manufacture (ATI)? I have accelerated drivers that I have downloaded from the nVidia site for my Geforce card, ATI might have similar drivers on their web site.
One thing I recall reading in the documentation on the 4000 on the Linux Laptop site is you don't want to do the video card probe but I could be mistaken on that. Wish I had the answer for ya, I feel your pain if that's any consolation. I would love to get my hands on it and try and make it work.
[ February 24, 2002: Message edited by: VoidMain ]