I recommend FastFind and if that doesn't work there are a few more listed on that page. I wish to point out this is somewhat advanced stuff, i.e. you need to know how robots.txt works, user agents, SEO, fulltext searches and scoring, site crawling and templates all work. Not for cluless newbies (not saying you are, just heed my warning) - but FastFind is well documented and easy to install if you know the basics.
Beyond that and the links on that page, consider installing Google Custom Search - it's very easy, they have a new easy to use Ajax result page, and you have controls through the Google web site for indexing. This is not a bad alternative, at least check into it. Google offers an option to turn off advertising when licensed (free).
Last edited by SrWebDeveloper; 08-27-2009 at 03:09 PM.
Reason: fixed broken link