well i bought an xbox from a freind has a mod chip in it and its all ready im very new to this haow do i mod exactly i want to mod on halo 2 not on live just for when freinds come over what programs do i need and so forth please help fast

go to some of the map sites like www.halomods.com and dl maps for it.

or you could go to www.xllnk.com which has a nice sized map pack and all the tools you need to patch the maps