MDT Replacement Mode

I'm trying to replace the screen on a Surface Pro 8, and the manual straight from Microsoft says I need to run some pre-repair software. There does not appear to be any documentation showing how to actually do that. Here's the section in the manual:

• Prep Device – Device must be set in TDM Replacement Mode prior to removing a faulty TDM.
a. Connect software tools USB drive with SDT to USB connector on device under repair.
b. Connect power supply to device.
c. Power on device – Depress the power button on the side of the device.
d. Run software tool – At the device OS, use Windows Explorer, navigate to USB drive and run:
SDT – Select Repair setup and validation. Run the Touch Display Setup. At the end of the tool process
device will power down.
IMPORTANT: This step must be carried out on the device successfully before removal of a faulty TDM.
Ensure light levels in the work area remain consistent during the touch display setup process. 

I've been able to determine that the correct version of the SDT software is the "for Business version". The options to put it in setup and validation mode are not present when running from the machine. There are no directions for making a portable install on a USB. I started here: https://answers.microsoft.com/en-us/surface/forum/all/tdm-replacement-mode-on-usb-drive/9b02132e-6fee-46fe-9d90-1934303b8255 and after that and a bunch more reading I found some guidance that got me to creating a custom package, which I placed on my USB. It doesn't run. I've got to be missing something here. 

I just need to get this screen replaced. I have the hardware part handled, this software is really throwing me for a loop. Could I get some direction on how to actually make it work, or a detailed description of what would happen if I ignore it and just replace the screen?