I have a mod (A Suite at the Novac) and I would like to add an optional add on. All it does is add a script to a door. I have made a seperate .esp that just atatches the script to the door but when I load the 2 mods the script doesn't work. The script exists in the base mod but is not atatched to anything. In the add on I have simply added the script to the door. I know the script works as it was once part of the original mod but I would like it to be optional. I placed the optional mod after the base mod but it didn't work.

Do I have to set the original mod as the master and if so, how do I do that?

Also, if that is so will I have to make the base mod a .esm?

You can't use content from a plugin in another plugin. You'll have to make it a master using NVEdit.

You can make an in-game switch (in whatever form) to turn the functionality on/off

Yeah, it was a case of me repeatedly screwing it up and I'm sure folks were losing faith in my ability to fix it so I just took it out. It's not REAL important and there is another mod available that works (close enough) so it's not really needed as the 2 mods are compatible. I wanted to offer it as an add on so folks can kind of ease into it before I permanently put it back in. I did finally fix it but I seriously don't expect anyone to believe me. I just kept making stupid sloppy mistakes.