Next time start a new thread, don't spam an unrelated one from years before.
Original ECU files are in a section called 'Original ECU Files':
http://nefariousmotorsports.com/forum/index.php?board=17.0you will probably find the one you need, if not Google is a thing. Failing that, put up a request for the ori in the subsection for requests.
You will probably not need to bootmode it, nef should write your car ok, give it a try. Immo should just work if you have it paired with an ecu/cluster/key atm, but if not eeprom will need writing in bootmode.
Nye - please can you split this off, it's prescence here offends me.