After reading and trying just about anything I can find,

After reading and trying just about anything I can find, I need to wave the white flag. I am running multisite and have created a custom post type with custompress with 10 custom fields. I simply want to display the value of one of the custom fields for one post on a page in one of the sites. I don't know PHP at all and would rather not use it, but I cannot seem to find the shortcode that will pull only the value of the custom field. If PHP is the only way to do it. How do I get wordpres to recognize PHP. Sorry for the ignorance, but I hope someone can help