onboard audio with sound card (asus m/b)

[bayoupimp]

Hey, can anyone help me with this problem thats been driving me nuts? I'm trying to get my onboard audio to work on my asus p4p800 se m/b while i have an audigy 2 sound card working as well. I have updated the drivers for onboard audio and flashed with latest bios. Onboard audio is enabled (set to auto) in bios. What I want to do is have game sounds come from my speakers and teamspeak, or voip on battlefield 2, come from my headphones. The headphones and speakers both work (as in not broken, won't work at same time. I have done this before with a very similar asus board, just don't remember what I did. Don't have that PC anymore, unfortunately, Katrina took it away from me.
Any help would be greatly appreciated. Thanks.