Here are five McLaren skins for all the Formula 1 cars in GSC Extreme.
I can't figure out to make the rear wing sponsor on the Formula Reiza model. I think I have to change the masfile, but here I am no expert, so for now it's a Reiza logo on the wing.
I hope you enjoy, if you are a McLaren fan, I think you will.
Just extract to game folder, and remember to back up your original files.