So, now that I had the parts, it was time to jump in and do something. First, however, I took tons and tons of pictures of the project...that way, if I messed anything up too badly, at least I could return it to its original form.
Next, I decided to try adding the AC adapter capability. I found a lot of help on General Guitar Gadgets and other DIY pages. I'll try to reference important materials as I go through the project.
The power tap itself looks like this when it arrives:
Using the picture from Small Bear's site (click here), I wired it to the existing battery connecter like this: