Have a look at this.....
http://e46.mit.edu/
or this (nice work!)
http://forum.e46fanatics.com/showthr...light=m3+sedan
He even took M3 rear quarter panels and modded them to fit the 4 door so it had the correct fender/wheel arch flare.
http://mrmaico.smugmug.com/Cars/BMW-...09_TeMNg-L.jpg
NOT and easy job I'd say.
Barry