SCCM 2012 R2 - Configuring Uninstall "Script Installer" SCCM Application

Hi there!

Could anybody help and advise how to configure the script installer applicationwhich would uninstall the installed application, for example, 7-Zip?

Items of a particular interest are:

1. What should I put in the detection method of the Script Installer Application? When the script installer application runs it will remove the target installed application (i.e. 7-Zip) and the MSI GUID will disappear from the registry. 
   
2. Should I deploy script installer application to the collections if I am planning to use the script installer application as a dependency for installing another application?

Thank you very much for your information, in advance!