I need some help, thanks ;)

Hey, new to the forums. I do have a modded Xbox, and I need quite a bit of help with emulators. I'm not quite sure what they are exactly, all I know is that they allow you to play games from other consoles on another console. I have a modded Xbox, it has a PC hard drive in it.
My question is, how can I get emulators, and what else exactly do they do? Do they have a physical shape (in other words, are they tangible, or are they some kind of data thing?)
If it's possible, I would like to get an N64 emulator and a PS one emulator. I want these the most, if I can get others, great!
Any help is appreciated, thanks so much.

Wow, what a helpful group you guys are...

You know, this forum does not move as fast as you think so don't get impatient! Maybe people just don't know like you, so they can't answer the question! Plus I recommend you read the guides here. I personally don't have time to explain since it will take me forever.

http://forums.xbox-scene.com/index.php?showtopic=524593

Well I noticed that you are very nice and patient so here you go.
Try THIS.

Check the front of this site. There are various emulators for DL.

Emulators aren't physical devices they are software.

ePSxe is a Playstation 1 emulator and there are N64 emulators but I don't know the name of any of them since I don't use them.

Are you looking to run them on your Xbox??

It seems a little silly to spend days waiting for a reply when an hour or two of browsing and researching on this board will get you up and running. Theres a helpful 'how to' stickied at the top of the board entitled 'Configure your emulator here'....it really doesn't get much simpler.

i did see once that megadrive/genesis emulators work on an xbox ;)

^But you are going to want to stick to them on the PC. They don't bother to update them anymore, and Kega Fusion still kills them for me.