Unfortunately the windows version will not import the songs automatically like happens in mac OSX. What happens in the windows version is a playlist is created within iTunes called Limewire. But this is purely a reference to the mp3's in LW's dwnld folder. So you would need to manually import them into iTunes. See this for instructions on how to add songs (using Control & O keys):
http://www.apple.com/support/itunes/...ial/index.html