From your client I would like to see the HIICLIENT.log and the HIIHandler.log. Both of these logs are either in X:\LDProvision or X:\LDCLIENT.
Also, I would go to the properties of the HII Action and uncheck the box "Stop processing the template if this action fails" and see where it gets you.
I did not have the "Stop processing the template if this action fails" checked.
I got it to work by doing the following:
Here's what I have found, under 9.5 standard the provisioning scripting apparently mounts the partition and in 9.5 SP2 it doesn't so there is no drive letter.
I had to add a action of "assign driveletter"- partition -mount - partition id 3 (my os partition) letter D (I used D because i saw an example template with that, not sure if letter makes any difference)
Also the template sucessfully completed but it failed to install Intel rapid storage AHCI driver. I tryed your "Hardware Independent Imaging (HII) Preview doc and ran hiiclient but it fails. I left a comment under that doc.
It says in the hiiclient log fails to access hklm\software\microsoft\windows nt\currentversion 'key
I'm going to get a 8.1 version and install in Winpe and see if that does it.