-since it appears your onboard audio is pretty limited i would say that it doesnt support dolby headphone. you could however give razer surround
http://www.razerzone.com/surround a try which would work with your current setup without buying anything. if you wanted "dolby headphone" though you would need to buy a soundcard which supports it.
-razer surround, dolby headphone and cmss-3d are different software ways of creating virtual surround on two speakers.
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-if you ever see suspicious activity you can always use the "report abuse" button below a post. this is the triangle with the exclaimation point. this gets sent directly to the mods for review. while we can pretty easily catch duplicate posts, it helps when users use this feature to report others who are acting out of line (flame wars, insults, trolling, innapropriate usernames, profanity, etcetera).
-typically the mods here are very good at catching such things. while it would have been caught by one of us, i took the liberty of closing the inactive post. some users do it accidentally (clicking twice) while some do it to try and gain attention (posting in multiple sections). as long as its not excessive or a recurring offense we typically just close or delete the inactive post and keep the active one which is what i did with yours.