You are safe to run the install in /opt/fogproject as needed.
Copy the current /opt/fog/.fogsettings file to /root/.fogsettings
Delete the current /opt/fog
Copy the original server’s /opt/fog to the new server into /opt/fog as well.
Copy the /root/.fogsettings to /opt/fog/.fogsettings file.
Rerun the install to be on the safe side.
Have you checked what the settings are under SATA Operation in the BIOS/UEFI? I noticed on some of our machines if SATA operation is set to ATA on the image and then the machine was set to AHCI or SCSI that it would not image properly. The image installs correctly and it starts to boot but it does not function at all until you change the setting in the BIOS/UEFI.