It sucks that you cant, and its not particularly required for proper adjustment, it just is IMPOSSIBLE to know where your OFFSET should be... as the offset is a direct hook onto minimum pulsewidth.
Its the "base value" in the whole injection system... which is why you need to know it and how it works before you can go about adjusting offsets.
PS. Matt I can really appreciate the effort you are putting into start learning these things. I may suggest it is a bit easier to work with me on these subjects instead of saying I am wrong/ignorant of things in the future. I have quite a few bits of information after I have tested many of the min pulse width and voltage offset values in the PCM... and you would really be suprised to see how (poorly) t works.