As for the video card.... not really sure about this. If ATI's closed drivers don't work, you should be able to still use the non-ATI open source one. Alternatively, have you tried using Envy to install the grpahics driver?
*Woosh*
lol. I was reading that thread and people suggested alternate drivers but because it's not a case of double clicking a exe I have no idea how to do this. At college at the moment but will look more into it when I get back home.