as above from @
Kodename47
A00G/A01G/A02G defs compatible
just be aware that
OFT A00G A01G and A02G are all actually based on A01G rom
The stock A00G/A01G/A02G roms appear not to have been recompiled or what ever was done did not alter the locations of the known tables in definitions so they are compatible definition wise. It likely that changes were made to "undefined" or unknown tables in the rom for A02G
The A00G to A01G incorporated a critical fix to transient retard tables so its well worth going to A01G if your going to drive car hard, A02G seemed to just add more idle stability fix's according to the romraider gurus.
If you want a "real" A02G rom you will have to transfer all the changed tables from a OFT A01G rom to a stock A02G rom.