Maybe this video tutorial can help:
http://youtube.com/watch?v=r6B03n7DmSk (http://youtube.com/watch?v=r6B03n7DmSk)
And the Proboard's Help Section: http://www.proboards.com/forum-help-guide (http://www.proboards.com/forum-help-guide)
I hope that helps you. ^^