Hi Cindy,
In case Kethra doesn't spot your questions, here's some information that might assist.
Registration for 2010 events is due to open shortly. Christine Mooney, the 2010 Global Organiser, will be making an announcement when it is open. When it does, you'll get lots of information about registering events, including the elibigible event window and organiser forum access information (generally granted to those organisers who are specified on the Registration Form).
When your registration has been approved, you can create a thread for your event in the "Cities with Screenings" sub-forum. This is a great place to keep people updated about your event. The 2010 Global Team will also use the information posted there to spread the word about your event (eg. via Twitter) to give a little extra boost to your own promotional efforts.
You don't need to be part of a formal "Browncoat" group to host a CSTS event. As long as your event is registered, any group of interested individuals is welcome to host an event. Many events are organised by informal groups who simply name their event for the city in which it is held.
I hope that helps a little bit!