Need help changing "New Thread" button to "Start New Thread"

[PDIDDY]

yes it says "start new thread" but its just a generic square button, and I was looking for something like the original "new thread" button like the one i used here to start this thread.

Now I cant figure out how to convert back to the original "New Thread" button , now im stuck with this square "Start new Thread" button and have no idea how to go back to the original which looks much more professional.

--------------- Added [DATE]1322880401[/DATE] at [TIME]1322880401[/TIME] ---------------

I also have two great buttons I would like to use that i found on another site. Anyone know how I can add button images i found from an outside source. I guess I would have to put the new button urls someplace so that they show up on my site?