Hm, from what i read there, it isnt necessary, as u can see:
"NOTE: The ATI Control Panel is a useful tool, but is NOT essential to the operation of the driver and will NOT affect performance or functionality if it is not installed"
Basically, it means, that if it was necessary, it would be on the install guide, maybe im wrong, but i dont think that program wouldnt help :S damn, im getting to desperation point xD
Besides, QT isnt freeware, i can download it trial, but only works 1 month or so :S
Edit: my bad, it says control panel isnt necessary, not QT, ill give it a try.. :X xD