Some days ago, I released PADRE. PaDRe (PAtch Dependency REsolver) is a Perl CGI script, which can be run on any Perl enabled webserver, and is intended to help Solaris system administrators to easy the Solaris patching job. It will grep through the patchdiag file and compute the different dependencies of the patch. That way, you'll have a clearer view on the dependency tree of your patches.