I got my tuning stuff in and have been having a hayday. I found a tune in the repository that should be pretty close to what im running. Question is that i cant write the file because the vin dosent match. I tried changing to my vin and, like i thought i would, i got the famous os/vin mismatch error. How do i get around this? Vehicle is a 99 tahoe 5.7 vortec.