Idk if anyone has posted about this, but how do I use the menu that comes with the mod to switch skins in-game? i keep having to go into skin editor, finding the skin and hit test in game, I would really like it if some one could tell me how to put the skins/moddels on the menu list so I can quickly switch between them when I want.

Stick them in .minecraft\player_models

well I did but I mean, how do I put them on the list below in the pic

You have to export using the editor under File/Export and change mode to Export: Model.