How much does each credit cost? and how exactly do i order the program, how much would the total cost be? sorry for asking but i have a low bugget. Oh and wats the difference between the standard interface package and the professional? My cars are all GM, If i buy the GM type would i be able to tune fords aswell? the USB Cable, OBD 2 Cable, and MPVI pro EIO plug are included with the purchase?and if I buy it now would i have to upgraded 2.2.0 version?Would I be able to buy it with a credit/debit card? once again sorry for so many questions but these are the few things that are keeping me from buying your program. Just one more... I do know about cars alot but i"ve never messed around with thier comps, is there such a thing as instructions on howw to properly tune included with the purchase? Thanks a million!!!