Re: Completely Integrating a Previous bbPress Install
This is exactly what I’ve done in the past.
There’s a lot of pitfalls and problems trying to guess at integration methods to program BuddyPress to understand how to adjust existing installations to match the new setup. There really isn’t a database upgrade involved in keeping your existing forums, it’s just making sure that everything knows where to look to accomplish what tasks.
Having two separate platforms bridged in the middle isn’t a new or uncommon thing, it just isn’t something that makes your average site admin smile. 
