The main highlights of the Pioneer Receiver plugin are:
Download the latest version to the computer on which Indigo server is installed. If the zip file did not automatically expand, double-click on it to unzip it. Double-click the resulting "Pioneer Receiver.indigoPlugin" file. The Indigo client will open and prompt you to install the plugin. Click the option to install and enable it. You'll then be prompted to configure the plugin. The only configuration option is to enable debugging, which you won't want to do unless troubleshooting a problem, so just click the Save button. All done!
(See additional information URL for usage details).