2001??
Take the outers off(3 nuts inside the corners of the trunk) take all the bulbs completely out. Stick a pen or something inside the turn bulb socket and push the orange thing loose. Pre-heat your over for 250°F-300°F, put the housing on a cookie pan, put it in the oven and let it sit for 10-15 minutes. Take it out(while wearing oven mits, or bbq mits as I did) Pry the housings open, don't forget to lift up the locking tabs, there's like 8-10 of them around the housing and you have to lift one at a time as you're prying, if it's not coming apart easy it's not hot enough chuck it back in for a few more minutes. When you're prying them open have a butterknife or old screw driver laying around, and use it to break the white glue, if you don't the glue will eventually break itself and you risk little hairs of the glue falling in the housing. Pry them open just far enough for the orange thing to fall out. squeeze them back together, put them in the oven for a few minutes to soften the glue some more, take them back out and squeeze them together really tight, and you're all set.
Took me about 45 minutes to do both including taking them out of the car. A hint to make things go faster when you take the first out to work on it, put the second one in so it'll be ready shortly after you finish the first. I've done three sets of these now, sadly enough mine were the guinea pigs so I have a crack in one of mine because I didn't let it heat up well enough.
here's a good 9005 conversion site
http://www.bmwe34.net/E34main/Upgrade/More_light.htm you need to take the two guide rails out of the inside of the connector, then shave the top locking notch a hair. A dremel and a few minutes and you're done.