I was wondering if someone could help me.
I have added a category called ‘Case Studies’ in the post administration section.
Is there any way to add a meta box in the ‘add new post’ screen for ONLY the posts in the ‘Case Studies’ category?
You can find a good tutorial here.
If you are looking to customize Meta Descriptions or Keywords for a post, you should look at the All in One SEO plugin: http://wordpress.org/extend/plugins/all-in-one-seo-pack/