O.K., I have 2 questions. One- What does the words underneath our username on our forum threads/replies mean(mine says little peewee) and what do the stars mean? And how do you get the text under all your messages?

Go to User CP (upper left hand corner - next to 'Forums')
On the left hand side it says: Control Panel
Underneath Control Panel it says: Settings & Options
The first option is Edit Signature
If you edit that, you can change the the text under all your messages

The word underneath your username, also known as 'title', will change as your posts go up, everyone starts off as Pee Wee. At one point you can choose your own title.
The stars also go up with the number of posts I believe, but they vanish once you get to choose a title I believe.

Hope that helps!