Currently DS (6.9 SP3) doesn't support WinPE 3.0. However WinPE 2.1 can be used to deploy both Windows 7 and Windows 2008 R2 as scripted installs. For Win 7 it is both 32 and 64 bit and obviously for win 2008 R2 ... 64 bit :)
Havent got a clue about the Ghost tools. But the simple answer to your question is
No.
Just my 2 cents.