. . .answered in many other threads. However, the short answer is to select the Preferences menu element in iTunes. Under the General heading, you will see the last element on the dialogue page is to set iTunes as the default application for all internet downloads. That will ensure the future until you download another version of Limewire or iTunes. At which time, you should remind the Preferences box of your preference. And, before you ask, add all the downloaded Quickplay formatted files to the iTunes Library and they will all happily play in the Playlists there.