If I want to change the VIN of a ECM/TCM (E67/T42) using a 3rd party tool (not HPtuners) because its a VIN that does not match the OS, should I do this before a Custom OS enhancement or after? Would licensing or a write entire or read/write or anything else in the future be effected by this or cause an issue?

Its a 2007 TBSS OS and a 2008 TBSS VIN. Anything I should be aware of?