I downloaded 174.20 drivers from Guru3D.
They didn't fix the GT, but I now don't have to use the registry thingy for the GTS, it properly sized my desktop automaticly.
The main reason I bought the GT was in hopes that the G92 would eliminate a frame rate probelm in Final Fantasy XI in Vista, (wich it got better, but it's still not all-the-way right). I'm going to post the GT 4-sale here.
Hope this gets fixed.
Arkitech, I feel sorry to inform you that after four hours of researching online, (reading posts, reviews, etc...), there is not a fix to the overscan problem with the 8800GT.
FWIW, I too use a Sharp Aquos. Mine is 37".
EDIT: I found a post specific to the Aquos where a user got the display to show the full, unadjusted screen. Hit 'View mode' on your remote and select 'Dot by dot'. This will stop the cropping.
The user was using a 52" Aquos, but I tried this and it did work. However, there were some consequences. Fonts were not displayed the same, (slightly discolored and thinner text), the display seemed to be off on the overall color, and the screen position was off a tad to the top. Also, this will use the same setting for every input, not just the one you are on when changing the setting. I didn't try the other PC, (via HDMI), and my PS2 with this 'Dot by dot' setting so IDK what, (if anything), it'll do to those inputs.