i got a wire that cost about £3 out of dixons, it has a headfone jack at 1 end and 2 aux connectors at the other, connected the 2 aux bits to the speaker outputs and the headfone end to the mic socket on my pc...used wavepad which u can get for free to record it and bang
i think theres an alternative way of connecting the stereo to the pc with the same wire but i couldnt remember it so that way worked