Need free shipping for customers with group pricing

I have enable the invoice plug-in (http://www.zen-cart.com/index.php?main_page=product_contrib_info&products_id=230) and this is using the Group Pricing feature. However, I also need to make shipping free for only the customers with the "Invoice" group pricing option?

What is needed is that all customers with the "Invoice" pricing group should have free shipping, regardless of the price or weight of the order.

You would need to write your own shipping module for this ...

Cloning the Flat Rate shipping module could work and then test for the Customer Group that they belong to and activate it for the checkout if they are part of the Group ...

Then, you would use the opposite logic to disable your other shipping modules for these customers so that they do not display ...

For information on cloning a shipping module you might do a search on:
clone flat
clone item

for examples ...

Is there a market place here where I can find someone to code this for me?

I was so hoping there would be module already made for this... seems this functionality could be useful for others too.

You could post on the Commecial Help Wanted forum for help ...

Thank you, I'll try that.