I use the corner of a credit card to pop the side marker lights out. They are held in by a small spring clip.
The rear lettering is stick-on and can be removed by using a heat gun (hair dryer) and a length of fishing line. Soften the double sided tape a bit with heat, and use the fishing line as a garrote to slice the tape from the side. You will be left with a little adhesive on the paint and remove it with WD40 or anything that won't damage the paint.
When you are all finished, I think there are some folks here that will buy the letters from you. If the price is reasonable!
There are a bunch of photos of debadged cars in the gallery.
I think it looks pretty good, but got voted down when I asked for the forums' opinion!
This was photoshopped by a freind: