its strange i've had this problem too but only on my laptop.
downloaded the gp3 v1.13 patch, gp3.exe decrypt, and gp3 edit. Now, on my home pc it all works quite sweet (touch wood) but when i do the exact same thing with the exact same files i too have the trouble that the in-car cockpit view the tyres have a mirror effect of whatever you're driving alongside.
but it continues to do it even if you export the original settings, and downloading new tyre sets doesnt seem to help
does anyone have any ideas......
Bazza
"If in doubt go FLAT OUT!!"