Having recently re-installed my entire system except this control panel, I'm left with the following question: What did it really do? The operating system comes with it's own drivers for your ATI cards. This panel only lets you turn on and off little settings that just aren't visible to the human eye anyway. Well... not on my screen anyway.

Unless you have an urge to be able to rotate the screen so that you can look at it upside-down, it's better to let your OS do the driving.

By the way, the older versions of ATI Displays ARE available on their web site. But no uninstaller like Cowicide says.