Idk if this helps
http://www.e90post.com/forums/showthread.php?t=818566
When you collect all the parts and paint the trunk..at the end you have to re-wire the lights like this:
http://www.flickr.com/photos/sonictuning/7006803940/
then code the car to be able to read LED so it doesn't flicker fast. You're done.
side note: if you have a key hole for your pre-lci you'll lose that and you'll have to cut the wire off the locking mechanism.
If you have any questions ask me.