First off, none of you will be first with the "conversion", that title has been taken in some regards... LOL.
Secondly, Long, I am suprised BMW used a thermally active adhesive on the rear lights, but not on the front. (Which makes removing the amber reflector impossible) If you bake the taillights in an oven, at about 190 for 10-15 minutes (make sure they dont hit the heating element!) they will also come apart pretty easy. If you do this, you can simply stick them back together, reheat, force the seal a little, reheat, push them together some more, and the bond will be as good as when you started.
Ive done this on MANY headlamps in japanese cars, works every time.