Hi folks, I hope you can give me some advice and help to get me going..

As I statet in a GEN IV thread I am on the way to convert my '97 Tahoe (5.7 Vortec) to a GEN IV drivetrain. Engine is a 5.3 "LMG" out of a '07 Yukon, tranny 4L60E out of a '07 Suburban 4wd. The E38 and the TCM I've got didn't come out of the same vehicles as the drivetrain. I bought a Flash Scan V2 hardware and I am on the way to built me a bench harness to flash ECU and TCM.

Ok now the interesting part begins:
As I learned, with my flash Scan V2 I recieved the license for two VIN's.
Ok so far so good . Now which VIN should I use for the first of the two included licenses? The one of the '97 Tahoe or one of the '07 donor cars for the ECM / TCM... I know silly questions but as I said these are my first steps..

Then which tunes should I use to start with. I like to keep flexfuel and AFM.
I will have to disable the alarm and other related stuff from the '07 ECM, are there any infos and how to's somewhere? Maybe a list of the modules I have to address?
Also on the reflash of ECM / TCM , maybe someone wrote a detailed help list?

Ok that's the start I think there is a lot more to come... just thinking of the GMLAN bus ... I have most of the parts together ( ECM, TCM, BCM and instrument cluster) but I am just looking up a long uphill way....

Any help is very very welcome

Harald