DerpaHerp

So this question is kinda nooby but how the hell do you equip weapons or use items? I found a hatchet and a hunting knife but I don't know how to equip them i've spent like 30 minutes button mashing but I don't know how will it work. And some asshole teleported me somewhere base good thing that I didn't die but I have a broken bone so I couldn't walk, now im spending my time crawling. What item can I use to heal this or will it heal by itself? Edit: Oh crap some asshole teleported me again it looks like a military base or some sort, oh god I could hear shooting and theeeen im dead.

When I try to join a server with the Six updater it keeps saying that warfare2.pbo is not signed with a key. Im pretty sure my game is updated as im playing with steam. Im currently using the free version of arma 2 and the steam version of Arma 2 :OA