To run 3D pong:
1. Download OGRE from http://www.ogre3d.org/download/source and extract.
2. Set path variable OGRE_HOME to the folder containing all of the OGRE files (e.g. for setting the variable via command prompt use: setx OGRE_HOME D:\OgreSDK\OgreSDK_vc9_v1-7-1). For more detailed instructions on the installation of OGRE see http://www.ogre3d.org/tikiwiki/Installing+the+Ogre+SDK
3. Double click on pong.sln to run the project (requires Visual Studio)