Q:

Booting Ubuntu from a USB device even when BIOS have no option for doing so

I have an older BIOS setup in my laptop which does not have boot from a usb device option.
Can I still boot from a usb device?
BIOS version: Toshiba V1.40  Date: 26-Apr-2007

A:

You create a PLoP Boot Manager CD that can be used to boot from your USB Flash Drive. This is useful for computer systems that do not support booting from USB in BIOS.  The PLoP Boot Manager works by first loading essential USB drivers,  CD/DVD drivers, and Hard Disk Drivers. The user is then presented with a (Boot Menu) menu of possible boot devices detected by PLoP. The user can then proceed to select a device to try and boot from.

How to Create a PLoP Boot Manager CD

Download PLoP Boot manager, and extract the files from the Zip to
your Desktop
Burn the plpbt.iso to a CD using your favorite CD/DVD burning
software
Insert your Newly created PLoP Boot CD and your  pre-prepared Linux
USB Flash Drive
Reboot your PC and set your System BIOS to boot from the CD
If all goes as planned, you should now be presented with an alternate
Boot Manager similar to the one pictured above that can be used to
boot your USB Flash Drive or other device.

Note: In some cases the Flash Drive will actually appear as a hard disk.
source and official site

