To identify your adapter, by initiating an LED flash, you can use Intel's WMI method "IdentifyAdapter". This command is referenced in on page 23 of our WMI documentation (http://downloadcenter.intel.com/Detail_Desc.aspx?strState=LIVE&DwnldID=9405). Using this method you won't need an NDA.
This should get you pointed in the right direction.
Awesome! Your suggestion not only solves the problem, it also bypass the need to sign any NDA...