depending on the donor car, you can replace the

hood,
left and right fenders
front bumper
then the headlights from the donor should fit

there was a thread in the HOW-TO section that discussed this route

you can get the tail lights from the donor, they have a slightly different pattern to them - the 2002 has a "diamond" pattern and the 2004 should have a "CELIS" pattern, that only looks like the CELIS tail lights of the much newer BMWs...