@gremwood:
I think it depends from your graphic card. I've got a 8800gts and there is no performance drop. But you can adjust the quality of the effect to get better fps on slower graphic cards.

Normally you can install every Adobe CS product twice, as long as you don't use both installations at the same time its completely legal. I've done the same thing here with my creative suite.

WOW tested the mod just few minutes ago and holy **** that looks pretty nice

Its tricky to setup, but once done it gives LFS that little bit extra touch of realism.

Cant wait to give mcintyrej's version a try