I want to add some custom fields to allow a user to select items from the Media library for the custom post (in the add/edit view)
Is there a way to do this?
My answer will be in the form of links.
The WPAlchemy meta box class supports this: http://www.farinspace.com/wpalchemy-metabox/ + tutorial http://www.farinspace.com/wordpress-media-uploader-integration/
You could add
to a metabox