The two outer lines are the aluminum studs and the middle line is the edge of the bathroom wall. So except for the upper bunk there's really nothing between the left and middle line to worry about. This is my basic working area. 

Now we're inside. The layout and process is the same for both bunks, but I'll concentrate on the top bunk. The horizontal line is the top of the mattress, and the vertical line is the front aluminum stud, or the left line in the previous picture. I made a template of the window cutout, and this is drawn on the green tape rectangle. Of course, the window is bigger all around than the cutout, so make sure you stay far enough away from the walls and ceiling. I measured and checked my layout about 37 times, but finally it was time to just do it. So I drilled a pilot hole inside the cutout line, and armed with my jigsaw, I hacked two 8" x 17" holes in the side of the pod. That was intense, let me tell you.

Skip ahead, and here's the top window installed. Just have to touch up the screws with some black paint and I'm done. The frosted glass lets in some light but still gives you some privacy when you're reading in the bunk at night with the lights on. I hate it when people read over my shoulder.

So here's the two finished windows. The windows are made especially for Scamp, and they'll be happy to sell you them for $80 apiece, though they may be on back order. There are a few issues you need to know about, however. (This mod looked pretty easy so you had to know this was coming.)

First of all, the Scamp folks are really nice, but they have no idea how an rpod is put together, so they can't give you any advice as to whether or not these windows will work for you. They're only returnable in new condition with pre-authorization, and then subject to a 20% restocking fee. I did check on custom windows, but the price made my heart skip a beat. This is the best window I could find after a LOT of looking, so what the heck - for you guys, I'll just go ahead and do it. I'm that kind of guy. 

Second, the trim/mounting rings that come with the windows absolutely will not work with the pod, no matter which way you turn them or how much you cuss. These windows are a bit thicker than the Scamp and rpod walls, so the mounting/trim rings work differently than the rest of the windows in the pod. I had a hunch this might be the case, so before I ordered, I lined up a source to make me whatever I might need for trim/mounting rings. Once I got these windows, figured out what I needed, and made a really really nice professional sketch, my source backed out. Crap. This forced me to modify the rings that came with the windows. This involved a hand grinder, jigsaw with metal blades, file, some blood and some cussing. If you are really interested, PM me and I'll give you all the gory details of what was involved. 

That window would still be a good option for a crankout IMHO although it's pricier than the one I installed. I specifically wanted a crankout, but if you were willing to go to a slider then you'd have more options in a smaller window.

One thing I do try to be careful about is not letting the bottom bunk mattress whack the window knob every time you open the storage compartment. I can see that eventually causing some damage if you let it happen over and over.