well i figured it out. If anyone else is curious this is how I did it;
I exported the registry settings from HKCU->Software->Microsoft->Multimedia->Sound Mapper for both states (on board and sblive sound cards) and labeled them KXAUDIO.REG and NVAUDIO.REG then I whipped up a batch file:
CODE
@ECHO OFF
:BEGIN
CLS
IF EXIST TEST.TXT (GOTO KXA) ELSE (GOTO NVA)
:KXA
ECHO HEADPHONES ARE NOW IN EFFECT!
REGEDIT /S KXAUDIO.REG
DEL TEST.TXT
GOTO END
:NVA
ECHO SPEAKERS ARE NOW IN EFFECT!
REGEDIT /S NVAUDIO.REG
ECHO SUCCESS > TEST.TXT
GOTO END
:END
The method is a bit crude but it works. Basically it looks for a text file and depending on whether it exists or not it loads up the keys from one of the .REG files. After it loads the .REG file it either deletes or creates the text file, so the next time I launch the batch file it will load up the other .REG file.
Finally I placed a shortcut to the batch file on my quick launch bar so now I'm only 1 click away from toggling sound sources instead of having to go through the control panel -> multimedia -> audio devices -> audio -> playback. Real convenience