Adding this plug-in to existing button?

Hello!

I have downloaded your plugin and firstly like to say that it looks and works like a charm as a widget.

In my current theme, I have two buttons that are assigned login and register that came with the theme. How do I go about using the plugin to bring up the pop up of your plugin?

You can see the buttons here: http://www.forums.jayceclarkephotoschool.com Please note that this is just a test forum until I can get it all working properly so it looks unfinished.

Thanks for any help

Jayce

http://wordpress.org/plugins/wp-modal-login/