theme_hook_suggestions on custom theme?
To suggest specific templates you probably need to do it in your theme's template file, use the hook_preprocess_HOOK where the first hook is the name of your theme and seconde HOOK is either page to suggest a page template or node to suggest a node page.

Here's an example

/**
 * Implementation of hook_preprocess_HOOK().
 */
function mymodule_preprocess_page(&amp;$variables){
  // change the condition to whatever you like
  if(isset($variables['node']) &amp;&amp; arg(2) != 'edit')
    $variables['theme_hook_suggestions'][] = 'page__'. $variables['node']-&gt;type;
}