Back in February 2008 Nvidia announced they were going to release drivers that would permit 8800 series upwards to enjoy PhysX without the need for a dedicated card. Earlier this month the driver pack was released, as detailed in our forums here. In addition to the extra effects, they also unlocked the Ageia Island map. How the GRAW 2 maps perform with PhysX set to extreme in the options, will vary greatly depending on the power of our graphics card, but to see the extra effects Thales has posted some videos in three posts starting here. For the very latest drivers see this post by Pave Low.