Umm... The trick with this one is to use a hex editor and cut off some bytes off the (J) rom sound file since it's larger than the (U) sound file. After you do that you import the new (J) sound file using ndsts. Hopefully that made sense.
It's not the movies or games downloads that I would worry about, like breaking into networks, downloading encrypted things, spying on network traffic. I have seen so many "Top Secret" seals on files when I was a kid
I was obsessed with finding UFOs, a surprising amount of US files where stashed on computers in other countries, China back in the early 90s omg sooo much