change the sign up page style

Hello, I need someone who is familiar with PHP coding to changed the style of the sign in and sign up page on our website. This is not a heavy job for someone who knows what they are doing and shouldn't take that long whatsoever. I can also help you out to finish the job quicker. the design also will be provided. not complicated at all. so don't worry. skype or yahoo communication should be available through out the project. Thanks