[Phantom]

I am not sure if there are any communities that modify that ECU but if you know assembly and have the time it can be done. You would need to read the original program them map out where the Operating system starts and ends then run the lookups for each table and figure out the table width and scales.

For reburning the ECU you will probably need to replace the Eprom chip with one that can easily be reconfigured.

It can be done and it may have been done already I would recommend going to delcohacking.com it is a group in Australia that has done this to some of the Holden cars and they might be able to point you in the correct direction or live next door to you and can help.