How to create a upload image metabox with remove button, like Flutter

Hello,

I′m really excited with the possibilities of WordPress 3 custom post types. I think it can really replace workarounds like Flutter to create a CMS. I use Flutter to develop themes to clients manly because of the custom panels and the upload of images process, that I find somehow more user friendly for my clients than the built-in uploader.

Since WordPress allows now a custom post, I′m trying to create a Flutter style metabox to upload images and not use Flutter anymore. I came across a brilliant tutorial at Deluxe Blog Tips (https://www.deluxeblogtips.com/2010/04/how-to-create-meta-box-wordpress-post.html) and the recipe works like a charm.

The only thing missing is a remove image button, so I can use only WordPress Custom Post Types. My skills in PHP are very limited, so I turn to the forum for a little help. Can anyone help me out?

Best Regards,
Tiago