Make a BackTrack2 USB Stick

"NOTE: This procedure works on the IRC Addict Pre-Release BT2 and the final release, but it does not work on sidc and earlier versions

1. Open the backtrack.iso file:

Option 1. In Windows, use a program such as isobuster
Option 2. In Backtrack, mount the iso
(mount -o loop -t iso9660 yourcd.iso /mnt/iso)
Option 3. In OSX, mount the iso

2. Extract and copy the /boot and /BT folders from the iso to the USB flash stick

3. Make the USB Stick bootable: "

http://backtrack.offensive-security.com/index.php/Howto:USB_Stick