No, images flow is separate from rest, this was my first change in the bbpress and I made it in not best way, because this is not a plugin, I changed original bbpress files in bb-includes etc. (gallery doesnt work as a plugin)
Here is my one (Polish site):
http://vip.barlinek.net
Main best feature made by me there are nicer URLs for topics, create images gallery, tags for images, allow upload images by users, create comments for them…
