Many times when I am searching the web I want to find out what one website has on just one name but they don't have a way to search their site. One of my favorite ways is the "Google Tool Bar" http://toolbar.google.com/ . It will add an extra tool bar on your browser but has some nice feature, my favorite is "Site Search". When you are on a website and you want to see if they have more info you want. You just type what you want in the search field and then there is a little triangle next to the search button, click it and you will see "Current Site", click it and you will just get what is on that website. Site Search on Google Tool Bar has one problem, on free & personal website without their own domain name or large websites with a bunch smaller areas in it, Google Tool Bar will search EVERYTHING in that website.
Here is a manual way to do a Site Search, in a search engine type "site:" followed by the website & key word. Example for all the Chapmans in Conejos Co. Colorado on USGenweb <http://www.rootsweb.com/~coconejo/>. Since Conejos Co. is found on rootsweb in the coconejo directory it will look like this: site:rootsweb.com coconejo chapman. This will work on most search engine as long as the website has spidered (read by the search engine). Try it on a multi search engine, it could increase your chances of finding something.