Use the splinter cell one then. Get the lastest version (2.

. Its been made simplier in 2.8, there are two saves, you transfer them both over, one at a time because they both can't fit on an 8mb memory card. Then make sure you delete (or move) any other splinter cell save games from the xbox hard drive, remove any download content for it as well just to make sure. Now you should have a splinter cell save, and a linux profile.
Start up splinter cell, go to start game, then load "linux", click on checkpoints. Bingo, should come up with a menu, so on that menu backup your eeprom, then install the softmod. You should get another menu, do the first two options (virtual eeprom and virtual c), then the final option, select a dash (i prefer unleashx, its up to you) and select your fonts.
When selecting your fonts its not that important which one you go for unless you plan on upgrading the hard drive, 06 is all space above 8gig goes onto a F partition, 67 is all space above 8gig and below 137gig goes on F, the rest on a G partition.