There used to be quite a lot of script that can help you build a meta search engines in the past, these days there isn't that many of them around. I use a script I found at one of the script directories to create Askinz a few years ago, I don't think that script is online any more but just do a search for "meta search engine script" and you may find something that will meet your needs.
Have a look at these links: http://www.inoutscripts.com/products/inout_search_engine/ http://www.icthus.net/CGI-City/scr_search.shtml http://orbitscripts.com/orbit-searc...rate-your-own-money-making-search-engine.html
You can find a lot of sites like dogpile that allow the use of scripts by doing a simple Google search.