Help on USB install

Hi. I'm trying to install CAELinux2010 on my Lenovo W510 Thinkpad. The machine is only about a month old.

I downloaded the ISO, and checked it with md5sums. I couldn't get any DVD's to burn well (I think that was my fault), so tried to put it on a USB drive.

I have an 8 GB SanDisk Cruzer (I bought it yesterday) and I used UNetbootin to put the ISO on the USB.

When I boot up, the menu shows up and I use the default setting. The Ubuntu logo displays, with the loading dots moving. After a couple minutes of this, the screen displays:

[code:1]BusyBox V1.13.3 (Ubuntu 1:1.13.3-1ubuntu1) built in shell (ash)
Enter 'help' for a list of built-in commands

(initramfs)Unable to find a medium containing a live file system[/code:1]

If I type help, it displays some basic commands (i.e. ls, cd, mkdir)
the " (initramfs) " is the command prompt.

I've used Ubuntu a bit, but I really don't know what I'm doing when it comes to this. I tried to look around the file system, but I don't know exactly where to go or what to look for.

Any help would be greatly appreciated!
Thanks,
Alex

P.S.
I don't really need the "LiveUSB", I just want to install the OS. I'm pretty confident that it will work well for my needs. If you can think of another way for me to install this, let me know.