Hi Jeff,
Not sure what you mean by "zone template" (referring to Omega theme maybe?) but if all you want to do is to make a template for a Node, the format is:
node-{NAME}.tpl.php
where {NAME} is the *machine* name for your content type.
You can also find out the template suggested names by using the module devel_themer, and then clicking on the content type you are interested in. It will suggest functions in template.php and/or template names you can use, based on what you select.
make sure to turn off devel_themer after you need it though cause it does mess up other regular stuff (its a bit of a hog-bug)
there are other techniques to engineer the template names, but this should get you started.
Good luck!
rgds,
datarazor