Go here http://store.dmsscenariopaintball.com/ to register for the event, then just show up. Everybody is welcome, pre registration is almost over so if you want to pay less register soon. If you can't per-register you can still show up on Sat the 11th and pay at field but it will cost more.
As for playing in a scenario, if you decide to come play stop on by the Nemesis camp (we'll be there on Friday) and we'll help you get started, you're welcome to run with us for the game as well if you want, were registered for the Chinese side.
If you want to read more on the event or play go here
it has the game info (as well as directions) and rules.
Hope to see you there.