How can I get from menu.lst to syslinux.cfg?

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http://unix.stackexchange.com – Problem I'm creating a bootable iso from a YUMI USB drive to burn on DVD's for friends. More info here. I took the grldr and menu.lst from a bootable XBoot iso, but now I'm trying to figure out a way to get from the menu.lst to the syslinux.cfg menu? Is this completely nonsensical? Am I on the right lines / how might I be able to do this? As a little test I have the following in my menu.lst: ### MENU START label Syslinux Menu kernel vesamenu.c32 append /multiboot/syslinux.cfg MENU SEPARATOR ### MENU END But I end up at a grub4dos command prompt rather than my syslinux.cfg menu! No r (HowTos)