on LEFT in WB look for VistaPE core v12 (RC1) click it ,, you should see and build a VistaPE and not a reactOS live cd if you want a vistaPE cd.
uncheck servers you dont need right now,, and try again,
Well I did what you said to (see attached screenshot) and it ran to completion to download and then I tried clicking on the PLAY button in Winbuilder and nothing happened.