Tested and working configuration for Hiren’s BootCD PE x64 (v1.0.1)
set tftp-path tftp://${fog-ip}
set pe-path ${tftp-path}/os/winpe
kernel ${tftp-path}/wimboot gui
imgfetch --name BCD http://${fog-ip}/hbcd/Boot/BCD BCD
imgfetch --name boot.sdi http://${fog-ip}/hbcd/Boot/boot.sdi boot.sdi
imgfetch --name boot.wim http://${fog-ip}/hbcd/sources/boot.wim boot.wim
boot || goto MENU
Dont forget to change the BCD, boot.sdi, boot.wim locations.