It sounds like you are talking about Word, not Excel.
I have the default Normal file and I also have a JeffMacros.dotm file that I put in the Word startup folder. It automatically opens the macros when Word starts, but does not open the file in the Word interface.
This is much better than trying to merge macros into or replace Normal or creating an exe to do any of this. You can also have two macros with the same name in the two files.
The file can be saved in the right place with a macro. I have attached a sample macro file. When the user clicks the button, it saves itself to the Startup folder then closes. You just need to load your macros into this file for distribution, or copy this code to your other file and distribute that. Make sure you make it a .dotm file.
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