Hi,
I created a fully functional 4 deck skin.
It's based on the Deere skin.
It looks like 4 regular decks, but the bottom two decks (deck 3 and deck 4) are actually samplers.
The only downside of this hack is that you can't sync tracks if deck 1 or deck 2 do not have a track loaded/playing.
But if you use deck 3 and 4 as additional decks it shouldn't be a problem.
The skin does not support:
Sampler section
Microphone section
Vinyl control secion
Preview deck