Thanks for the replies guys.
My question wasn't so much how to use the tool once it's installed on the pump. I found that through searching, as well I have the bentley for diesels.
What the Bentley does NOT tell you, nor did any post I searched through on here and vwvortex (and I searched a LOT), is how to take the tube, locking screw, guage, and metal rod, and connect it all correctly, and screw it onto the pump.
That's what my question was.
For future reference:
Remove metal cap on thin end of guage.
Screw on metal rod, and tighten.
Insert metal rod into threaded tube.
Screw tube onto injection pump timing hole.
Adjust guage until it reads 2.5
But thankfully, I managed to figure it out after a bit of tinkering and I was able to check my timing. Because I am so awesome, I managed to quasi-randomly set the timing to 1.03 by hand, when I put it back together. Being that it's within .5 of 1.00, I just left it as it is.
Car runs like a champ!