I've finished the write-up, and added some pictures. I hope my writing isn't too confusing.
Remote X is running, and I added instructions for it to the write-up.
I've been using the laptop (Frankentop?) on my daily commute, and it's working well. Now I can get all of the unfinished/unupdated bits of my projects taken care of!
Next is trying to get the SD setup script running under Pixel_x86. As I mentioned before, I can't completely copy the ISO image using the laptop. I think it's something having to do with udev and automounting. Wish me luck!