different node templates according to layout and/or region

Issue Summary

First of all the module is very very good, great work!!!!!.
I need the possibility to use a different node.tpl.php (template) for the nodes according to the layout and zone they are showing in, i was playing with the module and checking his code and the first way that i found was:
in the file composite.node.inc, method: composite_composite_node_api where the referenced nodes are been loading, add to the node object the information about the layout and zone ($reference function parameter) later another module or theme implementing preprocess_node function can check that information and change the template_files variable in order to apply the desired template file.

What i don't like about these solution is that i need to modify the module (just one line: $node->composite_location_info = $reference in the right please).
If someone knows another approach i thinks it will help not just to me.

Thank you
Great Module