ok firstly these are the tools required:
http://unetbootin.sourceforge.net/
and you will also need a usb 4GB in size

Step 1. Download Unetbootin and run it. you will be greeted with this
...

try this

http://www.backtrack-linux.org/forums/beginners-forum/30571-how-boot-usb-when-option-not-bios-settings.html

or try video=myfb

Ok firstly yay first post and secondly i spent hours trying to install BT4 on my ibm netvista p3 it only has a cd reader and it doesnt have the option to boot from USB in the bios settings but after...