Thank you for the reply. I will look into this.
What I am currently doing is having AI do the SOFTWARE\[Manufacturer]\[ProductName] Registry entry and give Everyone Full Control in the Permissions. Now, in the program, I can look to see if the desired named value is present or not (RegDte) and create it if it is not and fill it in with the correct date.
What I like about this is that, because it is created after install, if the program is un-installed, Windows will leave that whole SOFTWARE\[Manufacturer]\[ProductName]\RegDte in place so that, if the user re-installs, that value is still there.
For the program to be manipulating the registry key, however, it is important to have those permissions in place or else Windows will give an "Access Denied" if the program is not being run As Administrator"