This resolved issue is about SEEFD_Access_Utility.exe which should available in the Utilities folder of the complete Full Disk download package.
"This is an application that allows an SEE-FD Client Administrator to boot from a CD and access an encrypted hard disk through the Windows Preinstallation Environment (WinPE). The WinPE platform provides the same access capabilities as when booting from the hard disk. Access to the encrypted hard drive is in both read and write mode. This support software is used to access and backup data on an encrypted hard disk in advance of performing Windows system repairs or recovery processes. The utility can also be used to perform a forensic analysis of an encrypted hard disk without the need to decrypt."
To authenticate to a disk you can use the following command:
SEEFD_Access_Utility.exe -n "username" -p "password"
If you want to know how to create the WinPE disk with the SEE-FD utils inside, please see the following KB:
How to create a custom startup WinPE 2.x-3.x CD - SEE Full Disk Edition
http://www.symantec.com/docs/TECH171553