Looking to solve the problem of having no search engine on this site, I have found Google Custom Search Engine. With 2 steps, a site search was created. You can now try it out by using the search box in the right column.
I used the technique that requires you to have 2 pages, one for the box and one for the results. Instead of just one page for the box, I have placed it on every page. The results page uses IFrames to return the results, along with some ads (no such thing as a free lunch).