Biggest power of Nvidia Inspector is that it can modify how driver shows the graphics. In some games it can give you advantage over others.
But anyway... I installed XNA framework just to check if this driver forced graphic effects works aaaand... They do. I've got dynamic AO here, but to make it visible I had to downscale Lara_shorts (original model from TRU) from 1.0 to 0.1.
Seems like XPS have quite large scale or just AO is freaking out.
Through this program I can force FXAA or even all those newest Nvidia's anti-aliasing options like TXAA (which renders pretty useless, since XPS is for static images or animations made of static images
at least from what I remember). I can limit number of fps, adjust texture quality rendering and such. Basicly all those things available from Nvidia Control Panel + those little things like forced AO (there're different kinds of AO, since there are basicly presets from specific games... I know that CS:Source use SAAO which is fastest, while UT3 has HBAO but for some reason it often gives strange results when something half transparent is behind something solid... Also can adjust quality of it and when set in performance it's easier to notice imo).