I had similar issues with 17217 (reported it somewhere), only 17437 finally worked for me.
The RegRead section pulls license data from host registry (if BR11 installed) and adds it to PE for you. I haven't tried building on a machine without BR11 installed. Should be easy to patch when I get a chance or report to the author for fix.
Well I do have BR11 build 17217 installed on the machine that I am building WinPE from. It's on my office pc and it was purchased and has a valid license. That's why I was curious why that information was missing. It's definately not present in my registry. So I guess I need to go ahead and upgrade to build 17437 to fix the missing volumes issue?