When I got my first Cossie, I reverse engineered the ecu software but didnt really do much with the info and in the end decided to design my own ecu and map it myself.
Took me about 4 years as I did it in my spare time and it was a lot of work and was a technical success.
However, my attempt at turning it in to a business failed but thats history..LOL
This is what I like about PF as we have a mixture of amateurs and pro's who like to exchange info and experiences.