Same forme, the mod doesn't work, even if i'm sure that i've done successfully all the steps described in the first post. If it can help i use the GOTY edition v11.2. Feel quite sad because one of the reason i bought the game is for the 24h of LeMans style races.
Thx crowtrobot to have taken time for this. I've searched a lot and have no idea how you manage to do it. Do you use some software to know what files do what and what you have to modify to make the mod ?