NOTE: I finished this before I took any pictures, and took pics as I undid and repeated the process. So I will try to make sure that the pics are adequately explained. Any questions just ask!
N.B. It probably goes without saying, but whatever you do for one side, you're going to do for the other.
Step 1: Supplies
Paracord - about 25-30 feet of it
Pencil - to sketch out what you'd like the web to look like, where you want it to go, etc.
Allen wrench/screwdriver: I used these to remove the straps and side rails, but I realized you didn't need to after I finished.
Step 2: First Paracord Wrap
To secure the cord, I tied two double fisherman's knots on either side of the NVG mount. It looks kinda nice, and it's pretty taut around the helmet. Exactly as needed.