Btw, I have USB 1.0 - and the computer won't boot from a USB stick as far as I know. Boots from internal HD, CD rom, or floppy disk.
By the way. I have booted pendrives successfully using a PLOP Boot Manager Floppy Disk also. Just boot the floppy and pick USB from the menu list on screen at boot. Has worked for me on my persistent antix2usb installs on laptops with USB 1.0 and no usb boot option in bios.