For those who don't know, let me do a quick rundown on softmodding an xbox.
First you need a memory card, a controller extension cord, and Mechassault/Agent Under Fire/Splinter Cell. (Or an Action Replay for 1) and 2).)
You need to cut the extension and splice it into a standard USB connector so you can plug your controller into a regular USB port on your computer. There are drivers and programs to use the xbox controller on a computer...
Then you need to get the proper gamesave (for the game you have) off of xbins.org and copy it to the memory card thanks to your controller.
Load the gamesave on the xbox and happily start Linux. Follow on screen instructions and you are good to go!
Now you can FTP to your xbox and upload software to it from your computer (including the emulators this thread is talking about).
If anyone needs more info about softmodding an xbox, PM me.