Thank you for documenting this. I have a 6MT E82, and I've been interested in doing an AWD conversion. I was looking at the E9X series AWD setups, especially since 6MT E9x xi models were produced, so the simplicity of the swap becomes that much easier, but in my mind, it also becomes more cost intensive. I'll be PMing you about the bracket.
Oh, before I forget, you mentioned having to make brackets. Were you able to utilize either the E90 or the E46 brackets and modify them, or did you have to fabricate them from scratch?