Quick guide to the Uninvited Guest Party Quest!

I've seen a picture somewhere with someone having all the masks. (Sad, happy, etc. So it's not necessarily the f2 face, right? Unless the guy really gached a lot for them, idk. And I hope this one doesnt expire ):

Edit: Oh, it's in this thread.
http://www.southperry.net/forums/showthread.php?t=4330