you will probably get more info posting on the paint and body section of the forum, but like the other poster said the panel is held on with spot welds. you don't drill out the weld, you use a special cutter, its like a hole saw bit that is slightly larger than the weld and it cuts around the weld. you will have to cut away the damaged panel to get access to the welds, a 4' grinder with a cutting blade will work for this. after you remove the old panel you grind down the welds, drill holes in the panels for the new welds, then weld it in with a mig.
Do everything with a positive attitude, it won't always work but you'll piss enough people off to make it worthwhile.
the voices aren't real but they sure have good ideas.