There are already several open-source PSX emus (Score 1)

For the mac there's <a href="http://www.emuhq.com/psmac">PSMac</a> and for linux there's <a href="http://www.emuhq.com/sope">Sope</a>. For the PC there's FPSE but I haven't the link on me. None of them are too far aloung but all are promising with more developers. Especially FPSE since he's working to HLE the bios also.
-Corey O'Connor