lol - some people aren't familiar with zip files.
The forum is in a zip file. You havve to create a work folder and use a zip program to unzip all the files and folders that are compresssed in the zip file to the work folder. The zip program will have an option to create folders from the zip file in your work directory - be sure to check the option.
Once the forum and subfolders are in the work directory, you can go to the documentation folder and read all about it.
There are several free/shareware zip programs out there - WinRAR and WinZip being two of them. Windows xp has an option that allows you to mount zip files just as if they were regular folders, but I forget where the option is located.