I have problems setting Windows version to Windows Vista in a Steam Game (Assetto Corsa). This game only works (to me and a lot of people) with this Windows version. But in the last times Steam don’t start correctly if you use this option. If you configure manually the system to Windows7 and then you set the executable to Vista, the game works. But I don’t know how I can indicate this on a installer (I would like to modify the actual one with this configuration). Can you help me, please?