BuddyPress.org

hi

You can use the existing/stand alone bbpress instllation.

from the backend buddypress->forum setup->use existing bbpress installtion.

Now if you have installed the buddypress on the root domain,and you want the url

yoursite.com/forums for standalone bbpress forum,You will have to make some changes.

Since with bp 1.1 yoursite.com/forums is used as the forum directory, you need to change that forum slug or install bbpress at some other url,say yoursite.com/some-forum