menus displayed on Menu admin config screens should be collapsible

My menus are too long and some times displaying my primary link's on the admin's menus page produce this error:

Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 6235715 bytes) in /home/www/5bd7f5647a1a06f9f4506ccc679902b9/web/includes/common.inc on line 167

I cannot configure the server memory options since my Drupal site is hosted on an Internet provider.

Other times a menu pops on the page with a message saying the execution of "Script : http://www.mysite.com/misc/jquery.js?7:13" does not terminates.

I'd like this too. How would one go about doing it? It must be possible with theme_menu_overview_form (modules/menu/menu.admin.inc). I've done a javascript solution to it which seems to work ok for me. You need to add the javascript to your administration theme using the .info file, and substitute your theme name in the code where necessary.

Drupal.behaviors.mythemename= function(context) {
	$('#menu-overview tr').click( function() { 
		$indentationcount = $(this).find('.indentation').length; 
		if($(this).next().find('.indentation').length > $indentationcount) {
			$show = false;
			if($(this).hasClass('highlight')) 
				$show = true;
			
			$(this).toggleClass('highlight');
			recursiveHiding($(this).next(), $indentationcount, $show)
		}
	});
	
	
	// Walk through table and hide rows which are more greatly indented than the row which was clicked
	function recursiveHiding(element, $count, $show) {
		if($(element).find('.indentation').length > $count) {
			// Remove the highlight class for anything within the hierarchy
			$(element).removeClass('highlight');
			if($show)
				$(element).show();
			else 
				$(element).hide();
			if($(element).next().length != 0)
				recursiveHiding($(element).next(), $count, $show);
		}
	}
}

Because I am also adding a lot of custom javascript to certain pages for my administration theme, I actually included it only for the primary links menu like this:

/**
 * Implementation of HOOK_preprocess_page().
 */
function mythemename_preprocess_page(&$vars) { 
	if (module_exists('path')) {
		$path = drupal_get_path_alias($_GET['q']);
		if($path == 'admin/build/menu-customize/primary-links') {
			$vars['scripts'] .= '<script type="text/javascript" src="/sites/all/themes/mythemename/js/collapsiblemenus.js?"></script>';	
		}	
	}
        
        ... Other stuff here... 

No new features in D6 at this point.

Perhaps this is better discussed in the module development forum?