There are programs for the PC like CD Everywhere that will help you do this, but I find it far easier to simply use Adaptec Toast on the Mac. In Toast Go to Utilities>Create Temporary Partition. Make a 650 MB partition and name it like you want the CD to be named on the Mac side. Change the icon with Command + I and paste in your preferred icon, then copy all Mac and shared items to the partition and set it up as your final Mac CD should look.
Once you finish this place all you PC only files (not any of the shared ones) in a folder outside of the new partition. In Toast select a Mac/ISO hybrid layout. Drag the entire Mac volume you created to the Mac side. Next open the Mac volume you created and select any files that are shared between both Mac and PC. Drag these files from the partition to the PC side in Toast. Now drag over the additional PC files into Toast and arrange them in the layout as they should look for the PC disc. Set the PC files to use Joliet naming and you can also set things like auto on the Mac side. Save and burn your CD.
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