trying to update to "new" ATI drivers killed X on my FC2

[Trevor Smith]

OK, I saw a note from someone pointing to a blurb on the fedorafaq about 
how to upgrade to "new" ATI drivers for FC2 (I thought). I have never 
had a problem with using yum and the livna repositories before so I 
thought, "what can it hurt?" The yum install or update, whichever it 
was, reported complete success without warning or error.

Now my laptop boots to a text login prompt instead of its old graphical 
login prompt and when I login, I get just the bash shell instead of kde 
as before. I don't actually know what *should* be done after logging 
into text command shell so I tried "startx" as a shot in the dark, but 
got a page of info, ending with an error and that's it. I'm stuck in the 
1970's.

So now my laptop is unusable (to me) since I have no significant 
Internet software that I can use from a command prompt and I am forced 
to boot to WinXP to ask: How do I back out of this update I performed 
(via yum)? Or am I shot and must I now spend days trying to figure out 
how the rpm system or, worse, how the X system works?

help! :-(