Hi Joe,
In order to create image there are three methods and four different PreOS option left for us.
The three methods are as follows
1. Console
2. Boot Disc(CD/DVD)
3. Network Boot(PXE- 3Com Boot Services)
The four PreOS are as Follows
1. PCDos
2. MSDos
3. WinPE
4. Linux
Out of all the four PreOS the best one recommended is WinPE as it has advantages over PCDos and is easier compared to others.
** To image using WinPE we should add required drivers for the network and/or storage components to the Boot Wizard
** Remember to add Vista 32drivers as the version of WinPE used is based on Vista 32 Kernel
** Follow the document mentioned below to add drivers to WINPE
URL: http://www.symantec.com/docs/TECH110136
To Create image using the three different methods refer these documents
To Use PXE(Network Boot Option) follow this document
URL: http://www.symantec.com/docs/TECH110129
To Use Console to create or restore image follow this document
URL: http://www.symantec.com/docs/TECH110408
To create a Bootable CD/DVD and Ghostcast server follow this document
URL: http://www.symantec.com/docs/TECH110729
Here is the video tutorial on adding drivers to WINPE
URL: http://www.symantec.com/connect/videos/adding-vista-driver-nic-windows-pe-ghost-solution-suite-251
Hope this helps