@Wayne-Workman Thanks very much for your help.
It turns out that you need to fill out this part CORRECTLY and with the ACTUAL path and not the MISTYPED wrong one as I had!! Whoops!! Check check and check again,
This is the part that my ineptitude caused all the issues:
First in your /etc/exports add this line:
/var/www/fog/iso/15.04_64 * ro,sync,no_wdelay,insecure_locks,no_root_squash,insecure)
@Wayne-Workman That makes me more confused as the Hiren (Ultimate) menu actually boots and works fine.
With regards to my issue with Ubuntu, what is it that the environment variables for set path and set nfs_path actually do, I’ve extracted ubuntu into the folder as shown called 16.04_64. Can you suggest how my config should look? I’m stumped! 
Thanks in advance.
I’ve adapted this from the Fog Wiki page (which I had already TRIED to use), to what’s below… I get warning fsck not present so skipping file system. Mount, can’t find /root in /etc/fstab
mounting /dev on /root/dev failed no such file or directory.
My version in advanced section: (Hiren works fine but guess it doesn’t load drivers etc)
:ultimate
initrd http://${fog-ip}/${fog-webroot}/iso/HirenBootCD.iso
chain memdisk iso raw ||
goto MENU
:ubuntu16.04_64
set path /fog/service/ipxe/16.04_64
set nfs_path /var/www/html/fog/service/16.04_64
kernel http://10.60.54.224/fog/service/ipxe/16.04_64/casper/vmlinuz
initrd http://10.60.54.224/fog/service/ipxe/16.04_64/casper/initrd.lz
boot ||
goto MENU
Hi,
Did you manage to get this to go? I am in the same situation. I’ve tried both extracting and just using the ISOs. Looks like I can boot hiren but no luck with any version of Ubuntu tried 12.04 as someone said that worked differently.
Dan,