Hi Phuktya,
The good news to your questions is there is a beta 3 to public beta guide published and included in the documentation created by dev. The bad news is it is a complete teardown of your current environment and a resinstallation/setup to get back to where you are now.
1) For me, I backed up the data, exported my user XML info, and then de-installed everything...again, the guide goes through the correct order/steps
2) Yes - like the previous beta, it is included in the "other server roles' selection when installing.
Hope that helps!