The fingerprint reader is a "new" security element with laptops and such. Basically, it's just another way for unlocking your laptop... with the scan of your fingertip.
As for graphics cards... you seem to have a pretty decent card listed already, so you shouldn't have any problems with what you have. (...in fact, I wish someone would send such a beautiful piece of machinery my way... I'd kill to have a high-flying laptop like that! :shock:) Although I know there have been a few issues with the HD video cards from AMD/ATI with Sims 2, mainly when it comes to the in-game TVs and computer screens showing up blank... but I believe they've already released a fix for that on the AMD/ATI website. :angel: