I'm not sure if I follow you or not. It sounds like you're trying to save a fully dressed figure to your library, and when you bring him back from the library he only has socks on, but the thumbnail in the library shows him fully clothed. If this is the case, it sounds like the rest of the clothes are not part of the group you're saving. I believe they do need to be conformed or parented to the figure to be part of the group so they'll save in the library. The thumbnail usually looks like the screen when you add your figure to the library, whether everything there is part of that figure or not.