If the original game loader was built with Ozmoo, you can just:
1. Build your own disk image using Ozmoo Online, without a loader
2. Rename the file "story" on your disk image to whatever the bigger file on the official Ghosts disk is called
3. Copy the loader file (the first PRG file on the original Ghosts disk) to your disk image
4. Make sure the loader file is the first file in the directory of your disk image.
If you're on Windows, you can use DirMaster to do step 2,3,4.