4senuff,
Cutting a windshield is something you don't even want to attempt. There are places that do it and there are places that will do it but they will have to install it also. Quite a few of the places do it with sand. It is a tedious process therefore costing more than just a few bucks but still affordable. Using heavy masking they will sandblast away what needs to be removed. You mismark it, you just pissed away a good chunk of change. That is why they would rather have the car, mark it, and install it. The only other alternative would be a lexan windshield but we all know what happens to plastic after awhile, let alone a windshield wiper dragging across it a few times.
Kevin