This is from the wiki and is the basic idea of setting up your show. You can basically substitute the cat5 connections for wireless in the diagram. You can use cat5 and wireless together where it makes sense.
If you are going to run 1024 channels, your biggest job is going to be sequencing. There are several good programs to sequence your lights with, but you are going to need to get moving with that real soon if you are going to build a gigantic show from scratch.
You have gone real big for your first year!!! It will be tough, but if you plan it out and start now, you can pull it off. A dongle can only handle 512 channels, so you are going to need 2 dongles.