I have Citrix VM that loaded from Citrix Provisioning server.
It loaded from tftp with 66 and 67 dhcp options.
66 = 10.0.0.76 (citrix tftp server)
67 = ARDBP32.bin
VM work fine.
I want to add some menu before citrix. As first variant I set up new tftp server and point dhcp 66 option to it.
In default config I add this (to boot from another tftp)