Those files might be anything, and it's very possible that there is nothing to decompress. The only way to really know where to look for in the first place is to use a debugger and find out. Otherwise you are looking for the needle in the haystack.

Well, when you look at this image, it sure looks like it's compressed data:
http://img.photobucket.com/albums/v227/Bobbias/pt_bin.png

Notice the missing letters in the obvious text there... In any case, I can send anyone who wants it the rom/extracted files if you don't want to go looking for it, and any help would be appreciated greatly. I've never done anything like this before, so the more help you guys give me, the more I'll learn (I'm pretty quick at learning, but there's only so much I can learn on my own when I've never done this before, and there are essentially no documents to help me work with a DS rom...)

Hell, has anyone translated a DS rom yet?

Dude, KC, you are a life saver. I was doing all my extraction manually, because I haven't touched C++ or anything for that matter, in about 3 years.
I'd work on it right now, but I've got driving lessons in about 10 minutes, so I don't have the time right now.