Xbox modification has come a long way in the past couple years. With the introduction of the TSOP mod, potential modders no longer had to shell out money for a modchip; rather just bridge two points on the Xbox motherboard. Now one doesn’t even have to open up his Xbox. Welcome to the world of soft modding. Using code exploits in certain games, a user is able to load a phony gamesave that will boot into a Linux based operating system and allow a user to mod his Xbox… in under ten minutes. Link.
Modding the Xbox in 10 Minutes