Do BOOTP need to be enabled on scope for ghost to work?

Im trying to ghost some images to client PC’s over our network, and i’ve noticed that in the scope for all routers but those going through a particular switch (which my client is not) that only DCHP requests are replied to.

Does BOOTp requests also need to be serviced in the scope (as i imagine it does)? Because i had one machine which started to ghost, but no others (tried about 6 or 8 other machines).

All just fail to get a DHCP response.

Any help greatly appreciated.