Extending MmoDemo for MMO style game

Hello guys. I have been using Photon Cloud for quite a while now and am very much satisfied with it. Now, we are planning to develop MMO game for that I researched and found Photon Server. I have done work only on client side so server side programming is new to me. I found a mmo demo in Photon Server. I have few questions related to it.
1. Is it enough for me or do I need to extend it?
2 Do I need to write a server from scratch according to my requirements?
3. Is there any tutorial available how to write server for MMO game?

Thanks in advance.