Here's what i do. I have a ftp/web server in my garage that is plugged into a 10 port hub. When I want to update mp3's I transfer them to the server from my pc. Then on the server I transfer them to the car pc and open the playlist on the car with winamp installed on the server. I add the add the songs I want and save the playlist to the car computer. *** long as the directories of the mp3's are the same it works like a charm.