That's cool Brian...cept he has DHP.

Dan.. OS ID is Operating Software ID. Meaning the version of the software. When DHP's guy (Charles) would get a request for say a 2001 Grand Prix GTP to be tuned, he found the newest version of the software that would be on the pcm and then opened that up in his program. If you try to use any other versions..they don't work. Therefore there is a compiled list of which versions work and which don't.