ctschantz wrote:
So far it appears that the problem was with the images I originally created.
Well, no. According to your own reports, the memdisk version doesn't matter, but the initial bootloader does, which goes against what Icecube said.
Either the initial bootloader is not installed "perfectly enough"


The fact that I can start command.com in the same floppy images also points to such combination (Syslinux 4.06 + eRompaq.exe) as the apparent culprit.
You also had one success and one failure with the new image you just built, depending on the "initial" bootloader. In your report, you said it failed with grub4dos, but we don't know how the original media was initially booted: is grub4dos the initial bootloader, or was "SYSLINUX 4.06 -> grub4dos -> floppy image" ?
In whichever case, some initial bootloaders are working, and some don't, whether you used some version of memdisk or something else to load whichever image.
I wish I could reproduce the problem, but I don't have relevant hardware.