RS also sells female RCA to stereo mini-jack adaptors. The ones I have are one solid unit, not cable assemblies. This eliminates the need for the female-to-female RCA adaptors.
You might want to make sure your Laptop's sound card is up to scratch, however. I have a Thinkpad and wouldn't think about connecting it to my receiver - the sound would be abysmal.
Maybe when i get a desktop with a good (SB Live?) soundcard.
Oh, and remember not to turn up the volume on the laptop to more than 50%. Better to run Winamp at 100% and the Windows volume control at as low as possible.