Please note - Many people have emailed with issues during or after following these steps. One thing they all had in common was that they did not do the primary install with the Retail 10.5.1 OS X DVD. Some people used iPC or Kalyway, etc, and others have used 10.5.6 or something in between 10.5.1 and 10.5.6. Since there are differences in versions, I can not promise that these steps will work with anything other than 10.5.1 and upgrading to 10.5.6 with the Cumulative update from Apple. I can tell you though, that this process worked perfect with my hardware and 10.5.1. Continue to contact me with questions or suggestions - photos and additional drivers. Thanks, and good luck!
Contact me here.