Ability to "promote" a song to a different deck while it is playing

DJay allows me up to four decks but my controller only supports Decks 1 and 2. This means I have limited control of decks 3 and 4. But I still like the idea of having 3 or 4 things queued up. It would be awesome if there was a way to move a song to another deck while it is playing.