At this link, there are several new updates from HP, including how to work with and profile non-HP papers. They are for v 6.0.0.8 of the firmware (the plain vanilla Z3100).
There is nothing there for firmware v 6.0.0.7, the Z3100ps printer.
I tried drilling down through the HP website, which is kind of like "Pin the Tail on the Donkey", an unnecessarily tedious and confusing experience, and couldn't find the same updated information for either firmware.
Can I assume that the information on non-HP papers will be the same for both firmware upgrades?
HP Z3100 Unofficial SiteBy the way, does anybody have an idea as to why the official HP website is such an obstacle course when it comes to finding new information? (Rhetorical question...don't bother answering it.)