I made it, finally... makebootfat -v -o %DEVNAME% -Z -Y -F -b ldlinux.bss -m mbrfat.bin -c "%1\syslinux\ldlinux.sys" -x "%1\boot.catalog" %1 this code worked for me mbrfat.bin taken from old reblu's ubcd2usb package Thanks. This made me able to boot from my usb-stick as well. I ...