|I could have screwed this up somehow I am sure...|
Anyway, the dumbest part came once I had the AC installed and reasonable well bolted and screwed down, and I was looking to fill the area above it where the window couldn't close, because, you know, it is a right-to-left sliding window. So I went down to the friendly local hardware store and I had this idea in my head, and I asked someone working in the place where I could find those little screens that slide to a bunch of different sizes. I found one, and of course they didn't make one that would fit the dimensions that I would need, so I bought the closest thing and started to make my way home.
Halfway home I had a sort of epiphany. If you had been riding in the car with me, or maybe watching on television, you would have heard a little bell "ding!" and seen a light bulb appear above my head. It is always a traditional incandescent bulb, but in my case maybe a flourescent bulb would be more appropriate because it sort of flickered on over the course of several seconds. "Why did I just buy a screen? Why the hell would I put a screen in if I was running the air?" That was the exact sentence I spoke to myself. Why would you buy a screen to close off the window of a room in which I was going to be running THE AIR CONDITIONER. That is just fucking retarded, but for some reason that was my big plan.
In the end I whipped a shitty and went back to the friendly local hardware store and fessed up to what I had done. The guy laughed at me and traded it for a precisely cut piece of plexiglass (which I cracked later on) which once installed looked perfect. I was really happy with it, and it was probably what I had wanted all along. Not a screen though. That was just dumb.