http://forums.lenovo.com/t5/T61-and-prior-T-series-ThinkPad/T60-USB-KEY-BOOT/td-p/44560
http://old.slax.org/forum.php?action=view&parentID=56009

tl;dr

este 1 rada, co som teraz nasiel, ale to uz asi vies :)

Go into the BIOS setting - Boor/startup order and move the USB to the first boot device.
If your Boot/startup does not have the USB listed then you cannot boot up with an USB device.

e: a tuto mas este nejaky popis USB failingu pri installe z neho
http://www.techsupportforum.com/forums/f10/how-to-install-xp-to-boot-from-usb-external-hd-272863.html