Update:
I've made contact with a company thats produces stand alone ecu's (
http://kms.vankronenburg.nl/), they offered to help me out setting up all the maps, these guys have years of experiance with racecars and can help me all the way.
I got his adress of a respectable BMW tunner in Holland, who told me that using these TB is no problem, as long as I use a pragrammable ecu. This will delay my anual trip to "the ring", but I dont mind, the car will be cool! If all fails I guess it will look cool in my office.....I know this road is very long and difficult but ill try to make updates and share all the info I come across.