Extract the zip file and move to the Bin folder.
- install.bat does all the work to setup the templates (run the .VSI and add the .DLL to the global assembly cache)
- CompositeTemplateWizards.dll contains the Wizards used from the project templates. This assembly must be installed into the GAC.
- Templates.vsi is VSI installer package with all the templates (need the wizard assembly in the GAC).
If you prefer building the code by yourself have a look into the Source folder. What you have to do is build the C# project, and zip all the project templates. Then zip all three zip-files together with the .VSContent file to a .ZIP archive and rename it to .VSI.
Have fun 🙂
And see this post for usage of the templates.