Specific head image to a page

[Timbow]

If your images are not css background images but linked in the html you can put the img tags in a component then use

PHP Code:

<?php if (return_page_slug()=='404') get_component('COMPNAME'); ?>

in your template, or some other snippet of php from here:
http://get-simple.info/wiki/components-depending-on-the_page

I suppose you could use a similar bit of php to link a particular page to a specific css but having a duplicate css is probably even less efficient than having a duplicate template.