1: You have to be a Server Admin, by getting a password, or automatic, from the host/SuperAdmin
2: Um, I think you mean a section of models. But, no. But if someone gave the community a save, you can put that in: C:\Blockland\Saves\Slate\
3: This has to be Evented such a way. If you event good enough, you can make every single brick fall with a touch of a brick. Example: "OnActivate > Namedbrick: (Such and such) > Killbrick.