I have managed to work out how to get into coding the F25.
The main one for me was losing the iDrive "Only use when it's safe!!!!" disclaimer. Glad that's gone. Haven't done much else though. It was a pain to organise - had to make a cable, stuff around for a day getting software organised, and then trying things to see what works.
************** and bmwcoders.com were the main sources of info.
Hmmm apparently not allowed to post that site name up here!