Connecting sound card

I recently bought the SABRENT SBT-SP6C from newegg.com and I don't know how I can get it hooked up to my surround sound. The only inputs I have free on my home theater receiver are the standard red/white rca's. So I was wondering if someone could help me out with what cable or converter I need to get the front, rear, center, and lfe outputs all to rca. Thank you very much for your time!

heres a link to the sound card:
http://www.newegg.com/Product/Product.aspx?Item=N82E16829130001&nm_mc=TEMC-RMA-Approvel&cm_mmc=TEMC-RMA-Approvel-_-Content-_-text-_-

 

Have you tried hooking it up to see what will happen, when you play a DVD in 5.1 or Pro-Logic?

 

I have hooked it up to my brothers 5.1 pc speaker set with those cables and it works perfectly. I just don't know what cord to convert it into rca connection for my receiver

 

There is only a White (Left), and a Red (Right). Those would be the only two to hook up. Let me let you into a little secret. The A/V receiver will figure out how to play back the analog feed from the sound card.