I've done some work on Hakkinen helmet, I made the computer associates visor sticker myself, the only issue is that it doesn't show in game. I check how it looks by going career and take some screens when he gets in the car, but it still has the Force India visor sticker, what am I doing wrong?
I discovered, that it depends on the higtxt_(driver name).pssg / medtxt_(driver name).pssg files. In the cutscenes, F1 2011 will display the visor, which is part of "helmet_driver name_d.tga" in the higtxt.pssg / medtxt.pssg file.