The forum is written in ASP. So the first thing you need to figure out is if you have a web server supporting ASP (PWS, IIS, etc ...)
If you have a server supporting ASP then you should not have to change any of the files, however, there are some that you should change to make it more secure!
To find out how to use Web Wiz Discussion Forums read the documentation in the documentation folder.
Click on the default.htm file in the documentation folder to get started.
All this is metioned in the ReadMe file.