After exploring what others have offered about this I felt reasonably prepared. It seems that most folks glued the sheet of aluminum to their tear and then cut out the edges and door, so I figured I'd do that too. After dry fitting and drilling out holes for the wires, I slathered both sides with contact cement and stuck in place. I started placing the clamps, but soon realized that only a small percentage of my edges could be clamped before trimming. With the sheeting flapping around a bit I grabbed my router and after about twelve inches of trimming the lights dimmed and the router was done. I next grabbed the jig saw. I quickly snapped both metal cutting blades (I had purchased the wrong size) and took a minute or two to

By the time I got back from K-Mart with the new jig saw blades, there was no longer much need to hurry as by then the contact cement had set. I took my time trimming out the door openings and shoe horned more contact cement into the all the gaping edges. I clamped them and we'll see if they stick..
There's got to be a better way!