I actually preferred the look of the cut bumper on my 2006 and the only reason I changed was because it was cheaper to swap bumpers myself (bought a new take off for $50) than it was to have a new V6 bumper cut and painted - and then I could use the money from the guy who rear ended me to do additional paint work on the striping.
Go to Pypes Performance Exhaust - Home Page
and you can download a template for cutting the bumper. It is easy to cut, soft rubber, with nothing behind it that you can damage. Make sure you set your printer to "full size" or your template will be off.