[Trent Adams]

Many people including myself have implemented the themes of bbPress and WordPress by actually making a theme in bbPress that looks like WordPress. There is information creating theme available here. As well, doing what you wanted has been tried and documented on these forums before, so I would suggest a quick search. I know so10 has a patch on his site at:

http://www.adityanaik.com/blog/bbpress-and-wordpress-integration/

Hope that helps!

Trent