To install 195.36.15, I followed the instructions in the comments attached to Opensolaris BugID #12196; here's a link
They're almost exactly the same as the instructions you provided. In step #11, I did a "shutdown -i5 -g0 -y" (shutdown to power off) instead of a "reboot -p".
I filed BugID 15751 at defects.opensolaris.org for the same problem; here's a link
An Oracle employee stated that this is known problem and is being tracked under Nvidia IR 614102. It's not clear if this is hardware or software problem.