I'm interested in creating having one custom field that will appear with every post.
So, I've been trying to modify post.php so that instead of having to make two submissions to post, ('Add Custom Field' and then 'Publish') I can treat the custom field as just another text-box to fill.
I've already putting it in just the extra code needed to create the form inputs, but there seems to be more to it than that.
Any comments or pointers? What should I look into?