Saving files on BT Live USB

[SupportOffline]

I've been semi-new to BackTrack and I'm new to linux, but I've used BackTrack before on my MacBook Pro to crack WEP keys.

Today I've downloaded Revision 2 (or BT4 R2) and I loaded it up onto a USB 2.0 flash drive. Then, without success, I tried installing ophcrack in BT 4. I downloaded the file onto the root, and then I tried installing it. Nothing worked and I put ophcrack 3.3.1 in the "root" file (which is like desktop on Windows, but it's called "root" in Linux.)

When I restarted the computer, I lost all data. I figured that everything will be saved since changes can be made to a flash drive.

Is there a way for the changes I made, onto a Live USB version of BackTrack, be permanent and not disappear when I shut it down?

[sickness]

Well I'm sure there is a tutorial on how to make a persistent USB install in the HowTo.