The support people in India actually were helpfull the second go-around and figured out I didn't have the proper driver (I installed the one the paper that came with the adapter cable came with, from the cd that it came with...) and now I can assign it to any com port up to #256 and it worked the first time!
So thanks for your help guys, this actually was helpfull.
For those that may want to learn from me, the adapter I got was from
www.MonoPrice.com #3726 for $5.81
The driver that is needed for Vista is here:
[Link: moschip.com]