zfd 7 w/ sp1 - "HP" and imaging updates version confusion

I need to update the imaging server running on nw65, because what we have
does not include drivers for our new HP laptops.

But I am having a hard time understanding what patch I need to apply? It
seems like there are a jumble of files available. A couple months ago I
applied ZDM7SP1_HP6 but did not (at least I did nothing other than run the
install procedure) apply the imaging updates.

Is this the newest available, or should I be applying:

Support Pack 1 Interim Release 1 Hot Patch 1

or .. what?