I think I have worked out what you just typed...This is a forum not a text message....
Anyway Go to your shared folder (outside of limewire)
Right click on a MP3 file
Select open with
Select choose program
Select itunes (or whatever you want)
tick the box that says always open this type of file with this program...
There you go you have now selected your default player and you will see the icons next to your searches....