Two characters on the same Steam account?

[ANTISOCIAL85 0]

My brother and I recently started playing DayZ, and though I'm several hours in and enjoying myself immensely, my brother tried to play earlier today on his ArmA 2 profile, and it spawned him at my location, with the same loot and the same zombie kills. Is there any way to play with two characters going at the same time on the same Steam account (we share an account on the same computer)? If it isn't possible to do simply by switching profiles in ArmA 2, then would it be at all possible for me to create a second Steam account for him to play on without being forced to buy a second copy of Combined Operations?

Thanks in advance for any feedback.

[Caviano 287]

CHARACTERS ARE ATTACHED TO CD KEYS! One Character PER CD key

To play separate characters, you MUST buy separate copies of Operation Arrowhead. Even then, to switch characters, you need to switch CD keys if you plan on using the same PC.

Edited July 16, 2012 by Caviano