Having a bit of a hard time trying to figure this out, and without using a plugin it's difficult. I'm trying to make the admin side as easy as possible for my client, and I think creating the media uploader in a meta box would be better and easier to use, but I don't quite know how to do this. The ability to choose a main image is also required, and I'm not sure if this is implemented within the WordPress system.
Does anyone know how this could be achieved? Like I mentioned, I do not want to use a plugin.
Thanks in advance