This makes the whole process really easy, because the USB stick effectively becomes an Xbox memory card, allowing you to easily copy files from your computer to the Xbox. These days, this process is much simpler, as you buy a cheap 'Xbox to USB' cable from eBay (£3 delivered) and copy your save file to a USB stick. Back then, I used a Datel Action Replay with an official memory card.
When I softmodded my Xbox many years ago, the only difficult part was getting the save file from the internet onto the console.
This includes installing a whole new dashboard to the hard drive so that your console is permanently modded. Once you have done this, the whole console is temporarily unlocked and you can connect it to your home network and copy files to it from your computer via FTP. You start the game and load your save file and the console freezes, then switches to a new dashboard, with the security removed so you have full access to the console and the hard drive. Modding the Xbox requires you hack the console by loading up a specific game DVD from a list, and having a copy of a modified save game file to use.
This one sounds complicated, but it's not as bad as you think.
