Xbox has the most secrets in the world out of aany other game console to date.
For instance the first thing you can do is add a new background like spider-man or any picture you want instead of the plain old green main screen when your xbox starts up. the second thing you can do is add a program called evolution-x which there are three updated versions out and only professional modifiers know how to install unless you know how to work the program Nero to burn the evolution-x image to a cd-r/rw and install it your self on the xbox,evolution-x allows you to record the data of any xbox related game to the hard-drive so that way you can just keep renting xbox games for $5 and record them and play them any time you want to without buying a $50 game or inserting a cd in the drive.You will be able to record only up to 40 games though which is still alot. Another thing the xbox allows you to do is connect your xbox ethernet port to your pc and download up to 900-1,000 arcade games such as for nes,snes,atari, and arcade styled games. You can switch the mod chip with a newer one that let's you play gamecube,and ps2 games in the xbox and you can also record those games onto the hard -drive in which case you can also delete the games you don't want and put other ones.
A professional xbox modifier charges normally $250 to do all this unless you find a cheaper charger like I found that charged $120 and she had other customers that were satisfied with their xbox's new capabilities however the only bad thing about this you can't get on Xbox Live online unless you go to the main screen and turn the mod-chip off which will blink a red light in front of your xbox instead of green confirming it.Then you can turn it on later because if you were to even try to get on Xbox live with a mod-chip on then you would be banned for good until you get another xbox.