Backing up certain parts of a database!

[exilera]

Hello everyone, I have a forum (at www.exilera.com) with a small database that I'd like to move to a new vBulletin installation at another domain. I created a fresh copy of vBulletin at the new location, and I'd like to take a portion of the other database and import it into the existing database at the new domain.

I'd like to move only user accounts, the forum structure (like forum titles and descriptions) and posts within those forums. What would be the best way to back up the database, and exactly which parts of the database would I need to back up? Could I do it via the Admin CP tool, or should I do it via phpmyadmin? I'm very new at all this, so please bear with me

Thanks!