I explored Rollyo. It was pretty easy to set up and create the "custom" search. I don't like it as well as the Google custom search though. The Rollyo results page is pretty cluttered with ads, whereas the Google custom search results page has only the sites on it (with a few ads on the side). Additionally, with Google I can specify that I want my searches to bring up results from only the pages I specify, and not any other pages that are linked to them. I didn't find how to do that in Rollyo. So for now, Google custom search has the edge for me.