OT Question: Regarding VGA Cable, Wii, Computer LCD

Want to play my Wii at the desktop with my computer LCD (Dont have a TV and even if I did I don't watch TV so its a waste of money)

Got a VGA cable, adjusted my Wii using a HD TV and set the screen to EDTV/HDTV. Set it up to my monitor (HDinput for the computer, VGA input being for the wii) boot up the wii, picture looks fine, set up my wii sensor under the monitor and everything works fine.

Only problem is I have no where (that I know of) I can put the L/R sound jacks, my comp's speakers don't have any extra input ports or anything. (Just for Headphones but that's it) So while I can still technically play my Wii, I'd like to actually be able to here sound lol.

I'm guessing I gotta buy an extra cable or something for speakers so I can hear the sound from the Wii?

(this is the VGA cable btw) http://www.youtube.com/watch?v=ArIj-EUlevI

Totally unrelated to CoH but yea, any ideas/suggestions would be appreciated.