I don't know symantec ghost, so unfortunately cannot answer your last query.
It seems strange to me that the users are displayed within quotes (""). Normally the name withouth any other characters is seen. Can you open command line, navigate to "C:\Program Files (x86)\PGP Corporation\PGP Desktop" and run these commands (before arguments there is double hyphen "-"):
pgpwde --enum
this will list the number of each disk. Check what number has your 238GB disk. Also check if that disk is under "managed" or "unmanaged":
assuming your disk has number "3", run this command:
pgpwde --disk-status --disk 3
you will see if the disk instrumented/uninstrumented and if it is encrypted
next command is this:
pgpwde --list-users --disk 3
this will list all users assigned to the disk. Do you something like that: User 1: Name: "gigi" ... or something like that: User 1: Name: gigi ... ?
with the following command you can check if the password you are entering is correct:
pgpwde --auth --disk 3 --passphrase <passphrase>
supposing the passphrase is "abc123!", the command will look like this: pgpwde --auth --disk 3 --passphrase abc123!
If you see "Request sent to Authenticate disk was successful" message, it means that the password is correct so you can use it to decrypt with this command:
pgpwde --decrypt --disk 3 --passphrase abc123!