Yes, you can bridge phpBB and Joomla 1.5.x using the JFusion component. It is installed as any other Joomla 1.5 component and with it you can easily integrate phpBB with Joomla 1.5.x.

Please note that the component works properly only with phpBB 3.

More information on how to manage your Joomla 1.5 is available in our tutorial.