sasquatch, sprry to say but you have to remove the bumper (super dupear easy)
check "how to's" for a diy on how to remove 04-06 bumpers. lots of little screws holding it on, but its NOT hard and really only takes 10 min to remove and re-install. just be careful of the plastic clips at the top of the bumper as it attaches by the wheel wells.

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I swear, my cars are like a girlfriend.
Sometimes its a rough ride, sometimes its smooth motorin'.
Sometimes she doesnt like how i treat her and sometimes i dont like how she behaves.
BUT at the end of the day, she loves it when I am inside her.

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'91 850i
'05 X5 4.4i
'09 Clubman S