I own an '05 Silverado, and I just acquired HP tuners. The softwear I have is the first version they came out with, I forget exactly what the name is. It has credits for an '02 Camaro on it, and apparently I am no longer able to buy credits for any other vehicles becuase they don't support this old softwear any more. Can I purchase an '02 Camaro PCM, and use it in my '05 Silverado for tuning?