How do I install Ubuntu 11.04 to USB flash drive?

[Jesse Palser]

Hi,

I have a new 8GB USB flash drive
and want to install Ubuntu 11.04 32Bit to it.
(so I can plug it into any computer and boot into Ubuntu)

I downloaded the Ubuntu 11.04 32Bit ISO and md5sum'ed it.
I then ran "Startup Disk Creator" from my Ubuntu desktop
and then created a bootable installation onto the flash drive.
(with 4GB persistent storage option)

I then put flash drive in my netbook and reset
and it does indeed boot off of the flash drive
but I get the same screen as if I had booted the ISO?
("Try Ubuntu" or "Install Ubuntu")

Above is not what I wanted.
Did I do something wrong?
I want the flash drive to boot immediately into Ubuntu.

Any help would be appreciated.
Thanks!

Jesse