Adding Javascript Tracking Code Across Many Pages

At the moment I want to move away from analyzing server logs and start using the javascript tracking code. The problem is none of our websites use a CMS and our developers have no time to add this code into every single page of our websites.

Is there a better way to add this code across a few thousand pages without a CMS plugin?

You could use a Web server module to automatically add the code to your pages (there was a forum post about doing this in apache, for example)

Is there an IIS version of that post? I can’t seem to figure out an equivalent way of doing it