Theming of a webform node
This depends on your template suggestions.

Open template.php in your theme folder, and look for a function named YOURTHEME_preprocess_page, if it does not exist, create it like:

function YOURTHEMENAME_preprocess_page(&amp;$vars)
{
    debug($vars['theme_hook_suggestions']);
}


And see what suggestions (and in what order) you have.

EDIT: this is a preprocess function I used in a theme of mine, in theme's template.php:

/**
 * Implementation of hook_preprocess_page()
 * @param $vars
 */
function THEMENAME_preprocess_page(&amp;$vars){
    // I like to store templates in different folders inside the theme dir
    foreach($vars['theme_hook_suggestions'] AS $i =&gt; $ths){
        $vars['theme_hook_suggestions'][$i] = 'pages/' . $ths;
    }
}
/**/


In your case, simply do debug($vars, 'preprocess page vars!'); to see what variables you have a dispostion (please note: flush the cache after editing/creating this kind of function, and the output of debug($vars) can be very big!) and then add your template suggestion.

Maybe this can help: theming d7 webforms