1. Save the .zip file from the packages page to a temporary directory
2. Extract the contents of that zip file to your package directory. If you're not sure where that is, you can find out from the Sho console by typing
   
   >>> shopackagedir
3. Restart* your Sho console

*Note: If you really don't want to restart Sho, you can import the name of the package directory name; for instance, for the Optimizer package, import Optimizer.