So let me get this right...you had an Autronic fitted AND tuned (presumably by a workshop who know what they're doing?)...now you want to download tuning programmes to re-tune it yourself?....but you don't know how to download or then connect to the ECU?...and then you want to play around with the tune?....hmmm...excuse me for saying, but this just has a tiny bit of a hint of a recipe for disaster....but I may be wrong, given that you are superman.