I am having problems installing Backtrack 5 to USB.

I used unetbootin from windows to create a backtrack build on a USB drive.

I then booted to the USB. From there, I partitioned a 16G USB into 2.5G and 13.5G.

When I click the link on the desktop to install backtrack on the 2.5G partition, I get this error:

The installer encountered an error copying files to the hard disk:

[Errno 28] No space left on device

This is due to there being insufficient disk space for the install to complete on the target partition. Please run the installer again and select a larger partition to install into.

I have been unable to work around it, although I have tried everything I can think of.

Also, I do not understand why the ISO build seems to be a good version of Linux, but the software on it is not runnable.

Any help is appreciated.

FYI, I tried following two other sets of installation directions from the web site, but each failed. I am now trying to go with the Install Backtrack icon on the desktop, but that does not seem to work. Any ideas?