As a new user of TunerPro RT I have discovered a person can get in over their head very fast if not careful. My goal is to eventually modify a few parameters in the ecm but right now I just want to monitor until I get more comfortable with it. It's my understanding in order to monitor I only need the definition file (.adx) for my specific vehicle? If so, where can this be found? I have searched quite a few sites and have yet to find one for a 1990 vette (non zr1). Thanks for any help you might have.