[Plugin: MailChimp List Subscribe Form] Styling the Form

I want to make some changes to the form but I’m not sure how to do that since it can’t be done through CSS.

Specifically I want to:

– Add “Value = Text Here” to the input boxes.
eg: <input type="text" name="email" value="Type Email">
– Change the submit button to an image.
eg: <input type="image" src="butup.gif" alt="Submit button">

– Remove the label text.

How can I do that with this plugin?