This program was fairly easy to set up; it comes as precompiled binary
with a separate config file, and a test.cgi. This latter file outputs the environmetal variables and paths of your server, and proved useful in deciding what to put in the config file (!).
The only negative point is the pricing; they charge by the forum. This gets expensive if you're a lone webmaster, and lacks flexibility. However, they do have a free, single forum version, which would be a useful addition to any site. It has ads, but they're not too intrusive.