So if you remove the HECI drivers from HII then the build work ok again?
As these drivers are not required for the build I would create a distribution package for the driver install and assign this in HII to to relevant hardware.
You can then add the second HII action under System Configuration to install this driver after the OS is there.
You will need to extract the install files from the softpaq and then find the silent install switch but then the rest should be easy to setup and should fix your issue.