You will want to make sure that you have installed the ghost standard tools from the new 3.0 suite.
This video is for the prior "new" boot disk creator. You can follow it for instructions on how to set up the pE 4.0 environment in GSS 3.
https://www-secure.symantec.com/connect/videos/symantec-ghost-30-boot-disk-tutorial-tech223404
This video has the steps for adding new drivers to your boot disk.
https://www-secure.symantec.com/connect/videos/adding-drivers-symantec-boot-disk-creator-tech227489
And last how to add automation to the boot disk. To get ghost to automaticlally join a ghost cast session you could add the switch -ja=session_name using the session name of your session.
https://www-secure.symantec.com/connect/videos/adding-automation-new-boot-disk-creator-30
Hope that helps.