ok to give u a quick description you need a cross over cable or a cord you use to get ethernet and a router ( i would sugest a cross over cause much simpler) then you hook the cable from the back of the xbox to youre computer. then you have to go about changing youre ip so I realy SUGEST you go straight to xbox-scene.com and look at there turtorials. they have a lot of good info about that PS> you have to have a mod chip installed also(get a solderless lot easier)
hard or soft mod your xbox to get ftping enabled. Then ftp as you would to anything to it. Easy as 1 2 3.