Previewing the page your post is going to be on

Hi, I am hoping someone can help me out with a small dilemma I am having. I have created a custom Theme using page templates and I am using categories to call the posts to the proper place on the site. And each category is being formatted differently according to how that material has been styled.

My problem is that I need the user to have the ability to preview the page that the post they are making is going to be published to, but currently when you click the preview button it just shows the one post on the page.php template with what ever formatting is made for posts on that page.

Does anyone know of a plugin or way to hack the preview button on the publish section of the new post screen? At the very least I would like to remove the preview button so that the users do not click it expecting to see the post on the page it belongs on the site.

I know you can just set the post to private to see it on the site w.o making available to the public, but I would like to keep this as simple as possible for the content managers.

Thank you for any input.