BDD 2007 ZTI by default will break on less than 512 MB RAM
The error you get in the ZTIValidate.log is ERROR – 255MB of memory is insufficient. At least 448MB of memory is required. However, the fix is easy:
1. Make sure you reduce the WinPE size per step 4 in the below article:
Adding a Windows PE 2005 image to WDS (boot-in RAM)
http://www.deployvista.com/Blog/tabid/70/EntryID/20/Default.aspx
2. Configure customsettings.ini with the ImageMemory value
[Settings] Priority=DefaultProperties=ImageMemory [Default] ImageMemory=256