Have you thought about using Excel to do this? In the post “I want to have a car show, where do I start?” http://www.wiscollectorcar.com/forum.html?func=view&catid=45&id=33209
I have a link to an Excel spreadsheet that will allow you to capture, name, address, city, state, zip.
You can then use this to easily print off labels for mailings. Also it captures their email address, what class they are in and then you can set it up to easily capture Class and Judging information.
It can automatically add up the Judges scores, and then you can sort for the class using the filters (it looks like a drop down button). Select a class, and then select the total score column to sort it from highest to lowest. Then you can copy and paste the top 3 (or whatever you like) into the second tab in the Excel file. That way you have all the details you need for announcing the winners.
You can find the file at: https://mywebspace.wisc.edu/rendres/web/carshowform.xls
Take a look at it and I would be happy to customize it to fit your needs, and I can write up a “How to” with screen shots if you like too.