The Ghost15 SRD on WinPE 3.0

Hello everyone

I have got create ghost 15 on winpe 3.0 because i don't boot with usb 3.0.

I have got use this topic

 

http://community.norton.com/t5/Other-Norton-Products/How-to-build-the-Ghost15-SRD-on-WinPE-3-0/td-p/241476

 

But i launch dvd in boot sequences, i have got à gray screen, and i see command windows, but norton ghost interface don't launch.

What do you do?

 

Sorry, my english is awfull...