what does what do? I took a used DME and made a clone of my original DME. now I have 2 that I can swap into my car. One to tinker with and one that I can rely on to get me to work on Monday morning if (when) something goes wrong.
Just did a quick compare between the 530i and 330i maps. Basically 80% the same but the 530i was an automatic so that's probably where most of the differences are.