Custom GPU settings

i think adding a few controls in a setup menu to allow controls for prioritising aspects like FPS would be a good idea. I seem to find my 8800 GT plays back really smooth (probably over 30FPS) in sections of the reverse course where there isn’t much going on in the foreground. Then it all gets a bit clunky when I enter the built up area again. If I could reduce detail in favour of high FPS, that would be great.

I’m about to add another 4GB of RAM to my setup but I think it’ll be futile.
I can’t quite afford a high end GTX GPU yet.