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Where do i get the thing that lets you do mods
what kinds of mods (there are many programs.....)
if ur talking about HEK and Halo CE its probably in the gearbox forums
Or use this if you don't know where the gearbox forum is http://www.google.com
or i could give him a direct link, if he would tell us what he want to mod make new maps, change existing ones, ect.