Clipshare script modification (Simple Integration)

I need a phpbb3 integrated in to my site so that user can do the following functionality simultaneously: Login, Logout, Change Password, Forget Password, Registration. This means when user performs one of the above action either from main site or from phpBB3 forum, it will affect both the databases simultaneously - Under a "forums" tab I also need my other website integrated into the website under a "Live Chat" tab. Also, need to remove a "blog tab".