Random SWF Script?

[bookin productions]

Hey a bit off topic but I am working on a website and can anyone help me with a php script I need to make. Here is what it does. It picks a random .swf file from a list and shows a little jpg image of it and you click on it and it goes to that page where it plays that file. So when ever someone goes to the site the image is random.
Thanks in advanced
Also put it in lamon terms I am a little slow still with PHP!