Even not guru in Facebook (I can say that I'm average user), I have port 2 of my php scripts to work as Facebook application. They work fine, but the installation is a bit difficult for novice users, as they have to create the Facebook application and then install the php script on the server.
I've seen some php scripts (eg shoppinig cart, forum etc), where the installation is automatic. The Facebook owner just hits install, accepts the terms, and the installation is done automatically.
Can someone point me to the right direction to be able to do the same?