Scripts can be added to the VE through installable packages. A package can contain any number of scripts, as well as help files, hyperlinks, and any other files required for a script to run (data files, data templates, etc.).
An installed package is automatically added to the VE Python Scripts navigator. To install a package, select Tools menu -> Manage Script(s) to open the script package manage. Click the install button and select your script package using the file browser. The package will then be installed.