step 1, download esotalk 1.0.0g4
step 2, download this plugin
step 3, unzip esotalk, let's just say extracted folder is esotalk
step 4, unzip plugin into esotalk/addons/plugins/
step 5, follow this guide to install esotalk
step 6, once install, please go to Plugins in admin backend and enable RankGold
note, plugin has been tested with esotalk 1.0.0g4 only.