Thanks a lot guys.
Obviously, I'm an idiot. I thought the cable in question was a firewire cable, not realizing it is simply a USB A-B cable. That's a lot of time wasted :D
I also didn't know there were several versions of the Pod XT. I thought there was just Pod XT and Pod XT Pro or something like that. I just have the regular old Pod XT bean.
Again, thanks!