homeswitcher isn't necessary at all, that's just for people who don't know anything, it switches between android stock and LP. you can the same thing by opening up your "manage applications" and clearing all the defaults on the stock android homescreen. then when you push home it will ask you which home you should open, LP or stock home, and you can pick LP and check off "always do this". If you ever want to go back, go to manage applications, clear defaults on Launcher pro, push home, and then pick Android OS.
Easy.
Odds are when you get LP, after installing, you'll push home and it will prompt you either way without going through the system.