Need help with customizing apperance of search results

I am doing some doing some web optimization work for a friend who is a Realtor. Their site is hosted by Advanced Access, which is a hosting service for Realtors. One of the main things they want changed is how the search results of the property search are displayed, such as show a larger image and displaying the information in a different order. Advanced Access does allow for some customization, but only of the search fields and their order of display.
I called the support line to see what kind of customization was allowed, and basically there is none, just the information that is given, and the search is displayed through a frame link that gets the search page and results from Advanced Access.
So the only way I can think of accomplishing the task is to have some sort of script interpret the search results that are generated (the search is displayed in an aspx page) and then redisplay the information in the desired format. I know one way would be to screen scrape, but I am not entirely sure what would be the best way to go about that. I have done plenty of file parsing before but I have little experience in parsing data from web pages. So any help on suggested methods or even links to good tutorials would be very helpful.