[Tutorial] Ripping from Unity Engine games.

[Mended]

I don't understand anymore.

I've followed this tutorial, I've found several files which I think might be the assets I'm looking for, but I can't OPEN any of them using Asset Studio, it crashes or straight up extracts 0 files.
when I use Hex Editor to look at them, they have the UnityFS as the first line, but I don't know what to do with this information, you never told us what to do with it.

so I decided to save a copy of the file, and remove the UnityFS, Assetstudio now extracts it, but extracts 0 file.

PLEASE HELP, what am I supposed to do with these?!?!?!?