As it is set up, it uses the default vp map camera settings. 
You need the debug menu obviously.
Before you begin, in the Debug menu,
- untick show avatars.
- set the web overlay url to nothing (hides overlay)

Open the VPSAT-V2.ps1 in PowerShell ISE so you can set your settings.

You need to set 2 diagonal corner coordinates of the area you want to map. These example settings cover the entirety of Summerville. I recommend we standardize on how we capture. the default vp map camera settings cover a 20 coordinate square. So, my start and end coordinates will always be a multiple of 20.

$StartX = 500
$StartZ = -260
$EndX   = 100
$EndZ   = 100

Once you're set, hit the play button at the top of the Powershell ISE window. It should start controlling VP. Congrats, you've successfully launched a VPSAT!
it is important that you don't touch your computer while it is mapping. It needs to control mouse and keyboard for the entirety of the flight. 
All of the map tiles will save to C:\VPMapShots

Once your mapping mission is over, you can run VPSAT-Stitcher-v1.ps1 in the same way through Powershell ISE. You do not have to change any settings for this. It reads your C:\VPMapShots folder and organizes the tiles by coordinate and stitches them together. This is why i mentioned earlier 
in this readme that you should always start and end on a coordinate that is a multiple of 20. (dont start on x19 z 10. either start at x0 z0 or x20 z20