Override name of file field link in Drupal field.tpl template
There is an easier way to approach this without having to go through the template file:

On the 'edit' page for your content type, you can set it to 'enable description field'



which will add a new field to your content form that will let you override the label for the file, ex:



This should be easier than trying to parse the template approach and will work seamlessly with other modules that interact with the file field.