Page 1 of Connecting my PC to my AV amp

I`ve just got myself a shiny new PC (thanks to Chris Gould!), with a 5.1 sound card.

I`ve got a pair of 2.1 speakers, which do most of the time, but there are occasions when I`d really like to blast things out, so....

Whilst retaining the option of continuing to use the 2.1 speakers most of the time (without unplugging)

Ideally I`d like to connect it to the 5.1 input on my AV amp, but the amp doesn`t have any spare inputs.

I currently use the amp to listen to my hi-fi, and this has spare phono inputs (for a DAT etc) that I could use, so could I (and if so how!) connect the PC to the phono inputs on the Hi-fi?

Suggestions to what to use and where to purchase from are gratefully recieved!