How to add surround sound setup to your PC?

you might be able to plug it into the LR/RR port and get something out of it but i'm not sure as i havent tried it myself. generally speaking its not usually worthwhile to do what you suggest.

for less than $100 you can buy a brand new logitech speaker set in 5.1 surround. used you can buy them for half or less.

another option would be to go out and aquire a used home theater system and hook it up.

just some thoughts.