First time doing a retrofit as well. Took roughly 10 hours from unmounting headlight to retrofit and mounting.
Its not hard, just very time consuming.
I won a free set of FX-Rs from TRS on a facebook give away about 6 months ago so its just been sitting in my room :p
Ordered Luxury Mods fx-r brackets
Pulled the headlights
About 3 screws on each headlight and just remove all the bulbs, you can leave the HID ballast on
250 degrees for 10 minutes
Yank the lens apart
One bolt holding the chrome bezel to the headlight
Bought screws/bolts at home depot. I used 10/32 2"
Test fit e46-r extended
Shave a good amount on the bezel to clear the shroud
Remove the previous butyl roll, bake the headlight again to soften the glue then just use a screw driver to clean up the glue as much as possible
Apply new butyl