To be clear here, I fully understood the training video when it said, "Many of the facilities in VATUSA have the sector files available for download to the public from their website."
As I said earlier, the problem began when I followed the instructions in the video with the guy that mumbles really fast. The video explicitly says to download and install the Boston sector files. It doesn't say "install whatever sector files you can manage to find."
The fact that you are not able to do what the video instructs you to do is what prompted my question here. For those of us that are brand new to the simulated world of ATC clear instructions are pretty important but that doesn't happen in that training video. A while back I looked into this training but didn't continue. I'm starting to remember why.
Thanks again for the replies!