This morning at about 1:00am Jelle Druyts noticed the Installation Guide for Team System 2008 was missing in action. Not certain what Jelle was doing reading a Team Foundation Server installation guide at 1:00am but the world is once again a safe place as we have found where it was (mis)placed and have since put it back.
The Team Foundation Installation Guide for Microsoft Visual Studio Team System 2008, which includes Team Foundation Server, Team Foundation Build, Team Foundation Server Proxy, and Team Explorer.
Remember if you are using Vista you need to right click on the help file/*.CHM choose properties and "unblock" the CHM to use it! (see the image below)