If your importing you will need to chip your xbox, and believe me its dead easy i do a couple a week for friends as is, and i dont even charge them, just ask for a pint in the pub next time i see them.
Goto
Balbouncer and look for the executer 2.6 lite with non solder adapter, its so easy
Open xbox
Remove Power and data cables
Lift out HD
Lift out DVD
Press non solder board into the holes
Press chip into non solder baord
Put it all back together.
I know thats very non discript but look at
xbox-scene for more detailed information on chipping.