Joomla! Discussion Forums

I want to do a wrapped integration vbulletin - joomla, but I want to delete right and left column when I see my forum in order to ampliate his vision. Instead I want to mantein the joomla header.
Another question: Is it possible to amplify the widht of the joomla portal?
Thanks in advance and sorry for my english

You need to change the settings for your modules (except top menu perhaps) to not show on the forums page. That should do the trick.