The Public Knowledge Project has released "Migrating bepress Digital Commons Journals to OJS."
Here's an excerpt:
PKP has recently developed an import plugin that is specifically designed to port and preserve Digital Commons journal content into an OJS installation that can then serve as a journal workflow management and publishing platform. This import plugin was developed with financial support from the University of Minnesota Libraries Publishing Services to facilitate the transition of their Digital Commons journal content into OJS 3.1. As with all PKP software, this is an open source plugin that is now freely available to everyone, thanks to our friends at the University of Minnesota.