Man, there SHOULD be something like "Enable Reverse Stereo" like those old DOS games had, that would be awesome.
OK, I THINK I found a solution, but it involves bypassing your Windows mixer for this third party one:
It doesn't mention anything about reverse stereo on the site, but this program was recommended in a forum post that popped up in a Google Search.
seems to be a lockergnome forum: http://help.lockergnome.com/windows/...ict445575.html
so that should have a high probability of working!