Hmm, this is were my Linux skillz are th3 suck0rs.
Your going to need to get this file: http://www.nvidia.com/object/linux_nforce_1.0-0310.html
download the NFORCE file and follow the steps. Since were talking about Linux, I can almost guarentee you it's not gonna be as easy as 5 steps. If you look in the forum, you can probably get some more help with trying to get the drivers working.
I'm not sure what was going on with the FC5 install, I'm guessing it never started the install, otherwise the bootloader should have been toast. Did you try an upgrade or just a new install?
Also, if a MOD could move this into the Linux section, there might be some other people that could help you out more.