2 instances of the search styled differently (sidebar and in header)

Hi,

I was wondering if you could help me with the plugin?

I want to have 2 separate instances of the search, 1) For the Sidebar and 2) To place in the header of my page.

Now my problem is, I am using the function below, but I want to be able to style it differently to what I have In the widget sidebar?

<?php if(function_exists(‘wp_custom_fields_search’))
wp_custom_fields_search(); ?>

How can I have 2 instances of the search styled differently?

Hope you can help,

Thanks,
Paul