Get a head unit (stereo unit) with an aux in (like a CD changer, but not that). Then run a wire from the line out (or speaker out) on your computer to the aux in on teh head unit. Make sure your comp is grounded.
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I'm a ghost...email me if you have any questions on my old setup
PII 266, 512 MB RAM, 10 Gig, 36x CD-ROM, 16x DVD, DeLorme GPS, 5.6" LCD Screen, Dschmidt power controller, Keypower ATX DC-DC Supply, PowerAmp Macro controller, Dauphin mini-Kbd.
Sony Head Unit, Sony Unilink input selector, rear deck Kenwood 6x9's, stock door spkrs... All in my '96 Civic, of course :}
I currently use Y connectors to split the rca inputs on my amp and run my stereo into one and the speaker output of my carputer into the other (volume is controled with winamp)... I am planning to use a aux input cable down the road that will plug into my cd changer input and then I will use the line out (fixed level) and use the head unit to control volume..
1999 voyager pontoon boat
(soon to be computerized)