Fly II or GF4 problem?

I just noticed that the TS2 roads looked a LOT better on Johnny`s computer than mine. He has a GF3 grapics card, and I have a GF4Ti4600.After some thinking I enabeled the Fly II High Detail textures. The roads were suddenly fine, but the rest of the scenery got very blocky, no matter what I tried with Texel Alignment and by experimenting with the graphics options in Fly II. Is there a known problem with High Detail texures and choosing "More than 32MB" in the Fly II graphics options?Anyone experiencing this problem, any solutions? Or must I leave High Detail textures and go back to those VERY ugly roads?Btw, the blockiness shows in both default and TS scenery.First pic with High Detail enabled, second pic with none.