itunes
 

How can i use limewire to download music and then have the music transfer into my itunes library?

Duh! Look at the stickys at the top of this section. Press the Go button below left.

If you're using Mac OSX it can be automated. But for windows, you need to manually add them but there's several techniques you can use. Some people will add them by launching them from LW which is one other technique. Remember to have your iTunes preferences set to copy to iTunes music library when importing. iTunes menu Edit>Prefs>Advanced