I'm not finding the User Guide for 10.3, but the following is from the 10.2 User's Guide:
Using PGP Desktop with Apple Boot Camp
Apple Boot Camp is compatible with PGP Desktop ver 10.0 or later. To use PGP Desktop with Boot Camp, you must install the software and encrypt the disk in a specific order.
Before you begin, be sure you have installed Boot Camp correctly. For information on how to set up Boot Camp, refer to the Boot Camp Installation and Setup Guide (http://manuals.info.apple.com/en/boot_camp_install-setup.pdf) from Apple. Note that in order to use Windows XP in the Windows partition, you much configure the partition as FAT32. PGP Desktop does not support installing Linux on a partition in Boot Camp.
If you need to decrypt your disk, Symantec Corporation recommends that you do so from the Mac OS X partition.
For more information on using PGP Desktop with Apple Boot Camp, go to the Symantec Knowledgebase (http://www.symantec.com/business/support/index?page=home) and search for TECH149590 "Using Boot Camp with PGP WDE".
Note: Be sure that your disk is not encrypted (if it is, decrypt the disk before installing Boot Camp) and then uninstall PGP Desktop.
To use Apple Boot Camp in a standalone environment
1
Install Apple Boot Camp.
2
Install PGP Desktop on the Mac OS X partition and complete installation with the setup assistant.
3
Boot into the Windows partition and install PGP Desktop on the Windows. Do not run the setup assistant on the Windows partition.
4 Boot into the Mac OS X partition and encrypt your disk. At this point, if you pause the encryption process while running Mac OS X, you can boot into the Windows partition but you must resume encryption while running Mac OS X.
To use Apple Boot Camp in a PGP Universal Server-managed environment
1 Install Apple Boot Camp.
2 Boot into the Windows partition and install PGP Desktop on the Windows. Do not run the setup assistant on the Windows partition.
3 Install PGP Desktop on the Mac OS X partition and complete enrollment with the setup assistant.
4 While still booted into the Mac OS X partition, begin to encrypt your disk. At this point, if you pause the encryption process while running Mac OS X, you can boot into the Windows partition but you must resume encryption while running Mac OS X.
I suspect Customer Support can help you with your missing customer number.