Customizing a drupal webform for Drupal 6 I am working on a system that would require users to register online by filling out a membership application form. There used to be a PDF form that used to be filled out and sent for processing. The client wants the online form to be as close in appearance to this PDF form. Is it possible to customize a form created using webforms such that it can have some of these elements such as logos, images, etc.?
You can customize form's HTML markup using Drupal's form alter hooks:


hook_form_alter or hook_form_FORM_ID_alter
Form API Reference


after changing form's markup you should only styling form using CSS.