To use the Reading Pane, you will need to open up the Visual Studio solution file and search for all instances of "MODIFY:" These will be areas of the project where you will have to change the code to reflect your own CRM server address, organization name, etc. In addition, you will need to modify your Account entity to create a new tab with an Iframe to host the Reading Pane. The settings for the Iframe are shown below.
Download - Code for Reading Pane