Hmmm...if you want to do this with PHP, you'll either have to put the values from the layers in hidden form controls, or put them together in a query string...both of those options are a bit of a pain.

Either of those options would require JavaScript though, since you're wanting the values from layers instead of the radio buttons themselves. And if you're using JavaScript, there are better solutions.

Seems like this is a case of "not enough info." Can you upload it somewhere so we can help you? Even for a Code Ninja, this is a rather vague problem