is it possible to only show child IF custom field value has content

I am using the custom field and custom field link feature of your module. It is great and saved me a ton of time. I am not the only editor of our wordpress blog however. I often am asked to exclude some pages from the child list. I currently have to view the html generated and look at the code carefully to find the numeric id of the particular page in question. Then I have to add it to the excluded pages list in the shortcode.

What I would love to see.. is something like
use_if_custom_link feature for this module (but I think this would be more flexible as use_if_custom_content than use_if_custom_link) then it would apply whether or not the content of the custom field was a link.
Also we could setup a different custom field that would allow us to decide if the child is to be used in different places throughout the blog.
[hope that all made sense]

My dream:
1. list all the child pages of particular page – yes
2. use the custom field of those child pages – yes
3. if I want.. only list the child pages if a particular custom field has content – WANT WANT WANT

[child_pages cols="4" id="2173" exclude="6648,6662,7989,6705,6741,6769" thumbs="true" skin="simple" list="false" orderby="title" order="ASC" link_titles="false" words="10" class="myClass" use_custom_link="myCatalog" link_thumbs="true" hide_excerpt="true" link_target="_blank" more="click to view catalog"]

I only want to list the child page if the field contains content (a link in this case).