I have made an important update to the Backtrack 4 USB "Full" Encryption How-to.
I forgot to include the step where you select the drive install the boot loader to. Missing this step can cause the operating system on the machine you are using to not boot. Please review the how-to.
Below are some links to instructions on repairing boot records for a few common operating systems in case I am too late with this update:
I apologize for any issues that may have occurred due to my oversight.