Ok I'm confused on some stuff, all programmer related. So I've obviously decided after reading so much about SCT to go ahead and buy one. Not sure if it'll be the xcal 2 or 3, all I know is I want some custom tunes. Which brings me to my question. If I buy one and say my buddy who already ownes one has some custom tunes on his computer be shared with me? Or is it one of those things that can only be used on one programmer at a time? Sorry for the newbie question.