Phillips MMS 460 cable needed

Hi there

I have a set of surround sound speakers Phillips MMS 46o running through a sound card fine on my acer laptop

I now have a 32" LCD Sharp and PS3 and would like to link them up to that instead. I tried an optical cable from the sound card to the PS3 but it didnt work. how can i do it?

The cables from the SS are 3 cables (yellow, green and black) and on the TV i have HDMI, Scart, Optical coaxial and the normal audio Red and white connectors.

any help would be great

ps....would buying 3 2 way headphone splitters work and breaking its all down into one and plugging that into the headphone socket on the TV??