The bridge component for integrating SMF with Joomla is no longer supported. Thus bridging the two applications is not possible.

This is why the best solution for Joomla 1.0.x is to use a stand-alone forum component. The most popular forum component for Joomla 1.0.x is FireBoard. It is installed as any other Joomla component and it offers all features that you would expect from a forum application.