[Adam Harley (Kawauso)]

I guess it depends on the structure of the theme, but essentially you need to try and match the CSS elements in the theme’s stylesheet to their bbPress counterparts. Some of it will be redundant, and personally I found it easier to just take the bulk of the general styling and then add in the rest later. Didn’t turn out perfect though. I’d recommend using Kakumei as a base as well.