Just a few things about doing the MSP bumper conversion, since i've covered this a few times.
You need more than just the front bumper to make this conversion work. Depending on which bumper look you want (either the 2003 with the fogs, similar to the P5 but w/o sidemarkers) or the 2003.5/.7 (special lip on bottom, no fogs) Most of the parts involved are the same, but the main difference is the lip for the latter which must be ordered, or the fogs for the 2003 model. In addition to the front bumper, you will also need the front bumper reinforcement, new inner fenders, new upper grille (with flying M),and a small assortment of nuts/bolts/fasteners. Dealership will charge you about 1800 bucks for everything you need, including the fogs or lip whichever you choose. It's a good bit of work but looks awesome when its done, and totally worth the money IMHO.
If you have any questions on parts, installation, etc., feel free to PM me or IM me on AIM, I'd be more than happy to help.