Post #2 in the thread in the link below is a how-to to use fgrlx to install ATI proprietary drivers. If followed correctly, with all the steps followed, it has a high degree of success on F12. If you feel that these directions are too difficult, as mfillpot said, you should be using another distro, that isn't so bleeding edge, and one that has an older Xorg that allows for easier installation of proprietary drivers.
 
 
 
 
 
