Attached is a really simple Lisp code I use when rolling out AutoCAD's to map some Sheet Set paths that are found in the AutoCAD support directory. Simply modify this little code so it paths to the location of your template sheet sets. Or issue the OPTIONS Command. Then in the Files tab and under Template Settings you'll see a couple paths you can modify. The first one is the "Sheet Set Template File Location". This path stores the location for template sheet sets in the example option of creating a New Sheet Set.
Below you'll see you can have templates for many different aspects. This example shows a Custom Residence Sheet Set. And then a Subdivision Sheet Set. The reason why we like using the templates is all our Subsets and paths are already stored and ready to import sheets.
The next path is the "Default Template for Sheet Creation and Page Setup Overrides". This path is great if you use the Publish to Page Setup overrides from inside the Sheet Set manager. This will allow your newly created Sheet Sets to always look in one Drawing Template file for custom page setups. If you haven't played with sheet sets I would strongly recommend it for simply plotting. Because there is nothing like 3 simple clicks to publish 100+ sheets.
Sheet Set Setup Lisp Code- Download SSMSETUP.LSP