You already have asked a question as a reply to another thread! Using my moderator abilities, I've moved your question/post to a new thread for you.
We're big on questions at DBForums though, so feel free to ask more!
If you are asking how to start a new message thread using the VBulletin forum software, look toward the upper left corner of the page. You'll see a button labeled "New Thread" just above the grid that shows existing message threads (like this one).
In theory, theory and practice are identical. In practice, theory and practice are unrelated.