code: public function
  	GetThemeFile($name,$stack=null) {
  	/*//
  	@argv string Filename
  	@argv string Filename, string StackDefine
  	@argv string Filename, array StackList
  	@return string or false.
  	run through the theme stack and attempt to locate a file that matches the
  	request. if found it returns the full filepath to that file - if not then
  	it returns boolean false.
  	//*/
  
  		// if we passed a stacked request handle it. else assume the stack
  		// was passed explictly in the stack argument already.
  		if(strpos($name,':') !== false) {
  			$stack = explode(':',$name);
  			$name = array_pop($stack);
  		}
  
  		foreach($this->GetThemeStack($stack) as $theme) {
  			$filename = sprintf(
  				'%s/%s/%s',
  				$this->ThemeRoot,
  				$theme,
  				$name
  			);
  
  			// if this theme file was not found pray continue.
  			if(!file_exists($filename) || !is_readable($filename))
  			continue;
  
  			// else it seems valid enough so use it.
  			return $filename;
  		}
  
  		return false;
  	}
docs: //////////////