When you created the boot environment, did you use Ghost Boot Wizard to add the necessary Vista 32 bit drivers for the NIC and SATA chipsets on your target system? Win PE V2 will quite happily image Win 7 machines as long as it has drivers for the hardware.
However, some modern hardware no longer offers Vista drivers (although the chipset vendors often continue Vista driver support), and in this situation, you should look at this article:
https://www-secure.symantec.com/connect/articles/creating-and-using-winpe31-image-gss-251
There is some recent development activity on Ghost - see the thread about "when will come Ghost 3", that is near the top of the recent postings. If you don't have a maintenance agreement then you will have to wait and see what David comes up with regarding release of the updated code.