Something you might consider.

login kernel nfs://10.100.0.55/winimgs/iso/Winpe/wimboot gui iseq ${platform} pcbios && goto mem_bios || goto no_mem :mem_bios initrd -n bootmgr.exe nfs://10.100.0.55/winimgs/iso/Winpe/bootmgr.exe bootmgr.exe goto mem_cont :no_mem initrd -n bootx64.efi nfs://10.100.0.55/winimgs/iso/Winpe/bootx64.efi bootx64.efi :mem_cont initrd -n bcd nfs://10.100.0.55/winimgs/iso/Winpe/BCD bcd ...

Also realize that ${fog-ip} is a variable that expands out to the IP address of your fog server. If you use the variable it makes your pxe menus portable between FOG servers.