i recently got clear turnsigals. They came is the clear lense, amber bulbs and new housing for the turn signals. cool, right? ..... yeah, if i could put them in. I need to remove the front bumber in order to get to the screws on the inside which hold the housing in. My car is a '89 325i with the plastic bumpers, NOT aluminum. How do i remove my bumper without damaging anything else?