As mentioned above, the 'friend' had to turn his car back to stock which I would bet wasn't done, either knowingly or not. If he didn't then you have a piece of equipment that is worthless for your car as of right now. What you have to do is,
A) Send your tuner at your expense to SCT and have it unlocked for $150 bucks
B) After A has been done then you give Bama and American Muscle a call and pay them $150 bucks for their 3 tunes for your car.
If you decide to get more mods which it sounds like you will be doing, you will have to continue to get new tunes which will cost more since the $150 you will have to pay is not for free tunes for life, its simply for 3 tunes @50 each.
Unless you got the tuner free its not worth it imo UNLESS its unlocked and then its only a decent deal no matter what the price.
So if you have to have A & B you are basically at the price of a new tuner plus a little bit more for the tunes for life and a brand new tuner, if this is what needs to be done you didn't get yourself a deal at all imo.