It is very easy to avoid booting Memtest from a CD or pendrive and booting it from the network instead. Just download Serva and copy a tiny inf file; See it here.
http://www.vercot.com/~serva/an/NonWindowsPXE3.html#recovery
It works for both UEFI and BIOS clients
http://www.vercot.com/~serva/an/NonWindowsPXE3.html#recovery
It works for both UEFI and BIOS clients