I need to make some changes to the plugin, but do not know

Hello

I need to make some changes to the plugin, but do not know how to do. Can you help me please?

Take a look: https://docs.google.com/file/d/0BxAQq5vRCnn2YkpkM1ZUTFRGQ3M/edit?usp=drivesdk

Thank you so much !!!