If you regularly need to copy a file path as text, an easier option would be to create a service in Automator that will do this for you. First launch Automator and create a new service workflow. Then make sure the inputs for it are "Files or Folders" in the Finder (done with the menus at the top of the workflow). Then drag the "Copy to Clipboard" action to the workflow area and save the service with a name like "Copy Path as Text."