My tuner bought an MPVi3 with 6 credits for me to tune my Cts-v,Bare with me im new at this i downloaded the MpvI on my laptop so i can see peramaters at the track. He asked me if i registered it and i said no.My queston is i paid good money for this thing if he registers it is it still my unit? and can anybody tune my car with it? or do i need another one registered in my name?