.... What cable do I need? I have a Dell INSPIRION 1545 laptop, THE BOOKSHELF SYSTEM HAS A USB PORT FOR Windows Media- I stream NPR and want better sound through the book shelf systems speakers. There are no "AUX" input ports other than the USB- The guy at Radio Shack said that I needed an "8" USB adapter that I could get via the internet. Can anyone give me a definitive answer as to what I need and where I can get it