taking the bumper off is a five minute job, even for someone as mechanically challenged as me. after a good hour of swearing i eventually took the bumper off when fitting mine, mainly because i dropped the screwdriver into a void behind the fog lamps
the only tool you'll need that you might not have to hand is a 8mm socket to unscrew the 2 bolts that are accessed from within the wheel arches, other than that all you need are cross-head screwdriver & a 10mm spanner