Originally Posted by DArtagnan
Well, I'm not sure what you are expecting, but the textures have significantly changed and improved. The building textures on Liberty Island, for instance, look MUCH more detailed. They don't have any advanced effects, though - at least not as far as I can see.
But I'd say you can immediately see the difference no matter what.
I didn't install the NVTextures to a separate folder - I just replaced the existing ones. Not sure if that would help you, but otherwise I'm stumped as to what it can be.
Oh, and if you're serious about playing it - I highly recommend the Shifter mod - as it contains some nice gameplay additions. Most importantly, it rewards XP for appropriate actions ala Deus Ex HR. Meaning, you get more XP the more "skilled" you play.