I wanted to edit my website's Sign up page so that it

Hi,

I wanted to edit my website's Sign up page so that it matches other design elements.

Kindly see the screenshot to know what I wanted to do and help me out.

Also, Can you comment on how to add the wp-signup.php page to themes folder and edit it with theme's features? I will be using Anti-splog too, so while telling me the steps keep an eye on it.