You should just be able to take off some of the plastic shrouding between the bumper and the radiator. Look for the little plastic screw like clips (IIRC some really are screws, some aren't), then pull and cuss until you find the one you missed.

Or just do what I did. I figured I'd save myself the time of removing the plastic, so I just bent it out of the way and reached in. An hour and a lot of scratches later I gave up and removed it.