old game that bud..
I released an aimbot for it and some other mod-apps ,try looking on h ackhalo or the gearbox forums i released it on one of them.
also check out my warthog and banshee mods ( they should still work in multiplayer ) l.
(thats an example ) , google "tcrew halo h ack" tcrew , thrillerkiller and zues ( guns of destruction clan aka .G.O.D ) were my handles back then 2003 time google each one you might get a hit , good luck.