What program do translators and other patchers use to get into a .NDS directory?

I would like to know the program that's used to open up .nds directories to see which files, folders and .narc are in there. If you know can you tell me the name.For example: The game Kingdom Hearts Re: coded has an _en and _jp directory. How do you access that file and folder. Is there a program or do you open up HxD. I may sound a little weird or off-topic but think of this as help for a flashcart.EDIT: This is also for a college assignment I'm doing on hacking and emulating technology and hardware.

DSLazy

Ndseditor, that works for me

ThanksPost Merge: [time]1291709117[/time]

Replying to #3

Can you give me a download link?, because the other one isn't working.

this is where i got mine, http://filetrip.net/f5658-NDS-Editor-0-1.html
most of my hacking tools and stuff i get from filetrip

Nitro Exploder 2b and dslazy