Ok , thx for the fast reply! I think ill install this then.
horrgakx:

How much approximately will this lower my fps? I dont know anything about computers so can someone tell will i have problems if i install this?
My specs:
Intel Core 2 Duo E4500
4 GB ram 800Mhz
Leadtek 8800GT 512MB
64 bit Windows Vista
Fps around 200