Ok, I made the multiboot usb from this off the shelf software called YUMI, which i got from this website:http://www.pendrivelinux.com/yumi-multiboot-usb-creator/. The description on the website says that it “uses syslinux to boot extracted distributions stored on the USB device, and reverts to using grub to Boot Multiple ISO files from USB, if necessary”. The other OS’s on my flashdrive(Fedora 19 GNOME 32bit, Linux Mint 15 Mate 32bit, linux Mint 15 Cinnamon 32bit, and Ubuntu 12.04) all boot up fine. The version of openSUSE that im trying to boot off the fd is openSUSE 12.3 Live KDE, but I keep getting this error message that says “Failed to find MBR Identifier !”…
Is that the 32-bit or the 64-bit opensuse 12.3?
The 64-bit iso is structured for use on UEFI systems, and this is possibly confusing the tool that you are using.
Also I believe that openSUSE no longer works with syslinux. At least for the single OS setup you now simply dd the iso to the usb stick.