- Upload the in folder to the system/expressionengine/third_party directory.
- In the ExpressionEngine® control panel, enable the extension by navigating to Add-Ons -> Extensions, and then click the "Enable?" link for the "In" table row.
- If you don't already have templates set up to be saved as files, take a minute to make that happen. You must have saving templates as files set up in order for In to work.
Note: In will only work with templates that are saved as files.