I want to add a custom action to open a file that was installed using the windows installer that I have built. My question is how can I access the directory where the user specified the installlation path of the .NET application so that I can launch a help file after the application has been installed? I already added the custom action but can only get it to open a file with a hardcoded path. I need to access the installation directory.<BR><BR>Thanx.