OK.
I ran on ahead and just installed the Windows GUI version of the software and THEN discovered that it monopolizes my OpenGL pipeline so none of my other OpenGL apps will run.
So, now I want to switch over and just run the Console client, but I also don't want to lose the progress I've made.
Can I pull it off or am I SOL?
I took the risk, held my breath and...got it done; successfully switched from the graphical WIndows client to the Console client.
FReeper 4CJ had this post from back in December 2005 that gave me the clues I needed.
http://www.freerepublic.com/focus/f-bloggers/1537549/posts#94
For anyone else who cares to switch from the Windows graphical client to the console client "on-the-fly", here's all I did.
First, note that I already had the Graphical Client installed and actively working. So, I popped up the display, right-clicked and hit "Quit" so it would save it's work and stop.
After that, I simply followed the same procedures 4CJ laid out in the post linked above: uninstalling the graphical client, creating a shortcut to the console exe with the -configonly switch, launching it, and electing to run the application as a service. I used XP Pro's services.msc to start the FAH service and, like a trooper, it picked up my WU right where the graphical client had left off, which I confirmed with a quick peek at the FAHlog.txt file.