The decks fine Bar, there's just a brutal three lines of help to navigate....
NewLayout -
The Alternative_Deck.png and the Alternative folder go in -
PartyGaming\PartyPoker\Images\NewGameTable
The deck will be displayed in preferences, themes, card decks in the Party Lobby with a picture.
Old Layout -
The Alternative_Deck.png goes in PartyGaming\PartyPoker\Images
The Alternative folder goes in PartyGaming\PartyPoker\Images\ClassicTable
The deck will be displayed in preferences, themes, card decks in the Party Lobby with a picture.