I'm trying to create a custom multiboot USB using ISOs. I don't want to extract the ISO like most utilities do and I would really like to customize this exactly how I want it.
I have formatted a USB with a DOS partition table and created a FAT16 partition. I added a MBR to the USB and I can boot from the USB.
What I can't figure out is how to boot the ISO image.
This is my syslinux.cfg:
DEFAULT menu.c32 PROMPT 0 MENU TITLE Multiboot USB TIMEOUT 100 LABEL Debian LINUX memdisk INITRD debian-8.5.0-amd64-i386-netinst.iso APPEND iso
I forgot to add memdisk to the drive. All is well now!