I ran to that script before mate, But I forgot what was the name of the script http://www.hotscripts.com/PHP/Scripts_and_Programs/Classified_Ads/Employment/index.html try to see if you'll find one, I suggest you use jamit since your at it. Also see lots of reviews about the script. Good luck on your venture mate!
Those aren't really what I'm looking for, they're job portals, I'm looking for a serach engine that aggregates feeds from other specific jobsites.