Joomla Hot Property Search Engine Fix

I'm using mosets hot property 1.0 on my site [login to view URL] As you can see the search module on the main page of the site, it's an html form used with mod_blank, I manually created the form with all its elements and values. Whenever you search for "Ref.# 12323" it shows you all the properties that have any of these numbers in their reference number. It'll show you ID1 and ID2 and ID12 and ID23 But what I want it to show is only the reference number 12323. I want the search engine to search for the exact digits only 12323. If I wanted to see all the apartments who are for sale, it'll show me villas and lands as well even though I only wanted to see apartments. You will need to modify the core code of hotproperty.