PLZ ANSWER THIS!!! PLZ!!!!

HOW MANY WEAPONS CAN I CARY IN HALO 3 AND HALO 3 ODST?
AND IF I CAN ONLY CARY 2 WEAPONS, IS THERE A CHEAT SO THAT I CAN CARY AT LEAST 3 WEAPONS?

HOPE YOU ALL CAN HELP ME, I SHURE WHOULD APPRECIATE IT!!
:D