ClassiPress Search Widget

I am running a classiPress wordpress theme for my real estate website [login to view URL] I want some customization 1. I want a search widget: widget should have. Category, City, City Area, Price, Posted by, (Agent, Owner, Individual). When u select city the areas should change as per the city selected. and the total search shd be based on ajax i.e results shd be auto filtered with out refreshing the page. Mainly i will be using this widget on left or right bar of the website. I am using multilevel plugin for change city propose. Only bid people who have got experience in ClassiPress.