Would be easier if I just gave you the link to the babybmw forum where I have a full topic. I am one of the first people in the UK to do it and the first on babybmw forum.
http://www.babybmw.net/viewtopic.php?f=54&t=34566
There is now an official BMW retrofit kit available.
The photos below are angel eyes ONLY. Xenons turned off....if you want bright angel eyes, HID are the way to go without question.