So,
Maybe what Peter was getting at/suggesting was a plugin to WInamp that allowed you to navigate your HSX 109 based or PC based [with Rio Receiver software] mp3 collection from within Winamp then?
If thats the case, then Winamp v2.X has limitations in this area, so I would suggest that this worthy project could be done within Winamp 3.X [which is still in beta], but which is supposed to have a much more extensible UI - perhaps even allowing you to replicate the Rio Receiver UI to a point if thats desired].
Now, that would be a possible feature that might get some folks interested in *buying* the HSX who might not otherwise want to buy it.