Thank you for the Replay, its always good to hear advice from a master tech like yourself. This is definitely a great forum over here. I don't want to sound dumb but the ecu has many diff numbers on it, even two letters on it. Where exactly is the part number located on the ecu?
here is a ebay link with a good picture for reference.
00 MAXIMA ENGINE COMPUTER ECM ECU A56-PS4:eBay Motors (item 310134886747 end time Jul-09-09 10:20:53 PDT)
also would lets say a 2001 maxima automatic w/o traction control (those are the specs of the i30) work fine with the infiniti?