How to... add radio buttons to contact form tutorial

I’m currently using this tutorial link to do a contact form, i just added more input fields.

I would to know how to add radio buttons, or if there is a tutorial on how to add radio buttons components with explanation on how to mod the AS because not that able with actionscripting.

I get the premise behind sending the proper info from the input fields to the php, then to my clients email, but i’ve never added radio buttons so i don’t know how really works going through the php.

thanks in advance