Well, I found this forum post on this same topic:http://www.minimyth.org/forum/viewtopic.php?f=5&t=2261
Unfortunately, since I am not using dhcpd and additionally
I am using dnsmasq in dchp proxy mode, I am not sure there is anything I can do to fix this with my current setup (and I would have to do a good amount of reconfiguration and cable swapping and have to buy another network card to be able to use my back end as a full DHCP server).
Is it possible to hard code that boot file path into the image? If it is, that would be my easiest way around this, assuming the issue I'm having has the same cause as the one in that other topic.