I would select "info", then "media". That is where you can access the mp3's and the live band videos, etc. Well apparently you can't access the "games" and "demos". The directories are empty. But everything else you can.
So the other thing i figured out is when i select "play" at the startup, that takes me to the regular NesterDCv6.0 menu, where i can access the "games" and "demos". BUT, nothing else can be accessed. All the other files show up, but to my memory they won't play, when you select something it just blinks and takes you back to the menu screen.
So in conclusion (tell me if i'm right, here):
At the main startup screen where you have two options, "play" and "info":
1) If you want to play games and demos, select "play"
2) But if you want to access anything else, such as old NES commercials or NES mp3's etc, select "info", then "media".
Thats it i think. So there was really no problem afterall, just a little confusion. Its probably all very simple to everyone else, for some reason it threw me at first.

But all in all it kicks ass of course.
