I'd rate it a pretty easy thing to do, and it doesn't take long.
Depending on how low your car is, you may want to whack it on some jack stands. (We couldn't even get a shoe under the front bumper of the car in the pictures that i'm posting).
Start by removing the front bumpers. I'm not sure how american bumpers are held on but pre-facelift euro bumpers have 2 13mm nuts on the front and one 10mm self tapping screw on each side of the bumper. The bumper removes as a whole (remember to undo indicator lights).
Facelift bumpers have 2 10mm allen key bolts underneath that mount them onto the bumper shocks, the sides are held on by plastic guides. Undo the bolts and pull , again remember to undo indicators.
Remove the valance, its similar on facelift and none facelift cars. A mixture of 8mm self tappers. The plastic guides that hold on the bumper also need to come off.
Then you should have something like this.