So there is no way for me to view the rules in the package level to verify what checks are used to determine if the HPpackage is installed?For instance no. I have to add this feature in a next release.
If you really want to see these information : Right-click on an update, choose revise, click Cancel, go to Help, send Debug Infor, click on the link "show informations...". This will open the log file. Go to the end of the text file and search for "Isisnstalled"