[DCWGaming]

"Postgres" is short for PostgreSQL, which is a more advanced way to use PokerTracker.

There are guides to setting up SQL for PokerTracker on the Pokertracker site and forums.

Your postgres password and user name will be chosen by you during the process of upgrading your PT

Hope this helps,
-Dan

*edit* btw, this is my personal account. I'll probably be using this from now on.