“WCK images” are simply custom fields of a custom post type. Basically what that means is you simply loop through the custom post type of your choice and just output the custom field created by WCK. To know what field you want just output all meta keys for your wordpress post and see which custom field you need. Btw: Make sure its gettin saved unserialized -> I forgot how, just google for it.
Then output the field like:
<a href="http://google.de"><img src="[content field="wck_custom_image_field"]" alt="" /></a>
Hello, thanks for the suggestion. I included the patch (combined with normal WCK field) in the latest update.
It works a little differently than how you implemented it. I decided to reorganize the WCK shortcodes to make it easier to use. So, to output an image with specified size:
[metabox name="metabox_name"]
[field image="image_field" size="thumbnail"]
[/metabox]
I had to make it a full-size image by default, to be consistent with the [field] shortcode. For details, please see the documentation under Settings -> Custom Content -> WCK Fields.