Ok, maybe this will help: if you're using a Mac (you haven't specified) then Control-click an mp3 file from the shared folder then go to the "open with" selection, click the triangle and make sure if iTunes is set as the default app to open mp3s.
If it isn't, choose it, then be sure to click "change all" so that whenever you click a new mp3 file, it is automatically imported and played in iTunes.
Btw, why don't you try changing the limewire preferences on iTunes support? It will import future downloaded mp3s to iTunes automatically.
And sorry if again I didn't help but I am doing what I can with what I got.
