Doing the uninstall-reinstall song-and-dance with AMD drivers requires a restart inbetween, and reports say that the uninstaller doesn't actually delete ANYTHING anyway. So...whattafuck?
Nvidia's drivers do an automatic uninstall of the old drivers first these days (they have for over a year now I believe), so you don't have to uninstall-restart manually.
Plus they have a profile manager that is actually useful, and works, and which don't insult users by how stupidly onerous it is to manage.
I just let ATI drivers do their magic, it works, I don't even need to reboot my machine once, it's been like that ever since I bought my HD5...
Also there's a profile manager in CCC now, not really used it much though as I don't see the point of messing with (hopefully carefuly dev chosen) gfx settings.