There is a way to manually assing hotkeys to playlists. You can create windows shortcuts, then go into properties and assing a different key to each shortcut. But there is a problem since if you assign letter or number keys to playlists, they will launch whenever you try to type something using those particular keys.
I, for example, use this method with numeric keyboard. I have 6 playlists which contain my 1500 tracks organized by music genre (rap, techno, pop, etc.) and it works very well.