I used the LiLi USB Creator to create my bootable USB drive downloadable from here:
http://www.linuxliveusb.com/
There are some options available in it -
I picked my USB drive
I downloaded the Ubuntu 13.04 ISO as my source.
I set my persistence to 4090 MB (the max I could get).
I also selected all the step 4 check boxes
Then hit create. That worked for me.
how can you make a boot from USB thumb drive please help me. i am using HP Z200