Display header image based on page_id

There is information on similar techniques on the Pages page in the Codex at http://codex.wordpress.org/Pages

And an article on using multiple looks for single page views that might help, and more information on how to manipulate the WordPress Loop and conditional tags that work with the is_page() query at:

http://codex.wordpress.org/The_Loop_in_Action
http://codex.wordpress.org/The_Loop
http://codex.wordpress.org/Conditional_Tags

So there are several ways of doing this. Basically, you need a query that says “if this Page is id X then do this, if it is Page id Y do that”. It would sit in your Page template file, often called page.php.