Sims 3 Collectors Edition Plumbob USB

I never had one myself being a latecomer to the game (all things being relative, I mean it was late 2011 so the days of pre-release premiums were long gone). But from what I understand, the bonus content was stuff like Windows wallpapers and musical scores rather than things that could actually be used in-game. Was that about right or am I thinking of something else?