yo u guys so im mad interested in learning how to use like a tuning program i kno almost nothing about using them or gas and air ratios or any of that shit, im not looking into learning to tune so i can do it on my car i just wana c if i can find a cheap and easy computer program to mess with. im also looking into learning how to use autocad but i think the only version they have that is compatible with vista is the new 2009. I was wondering wat are some good and cheap tuning programs to learn to use and play around with.... and if u any of u guys has just the cds for either a tuning program or autocad compatible with vista pm me