Custom admin implementation for WP backend. This snippet provides references to removing and adding backend pages as well as custom roles and capabilities.

wp_custom_admin.php

class WP_Admin_Pages {
	var $reset_roles = false, 
		$page_name = "member_approvals",
		$board_votes = "board_votes";

	function __construct() {
		if ( ! function_exists( 'admin_url' ) ) return false;
		if ( is_admin() ) {
		  add_action( 'init', array(&$this, 'rolescheck'));
			add_action( 'admin_menu', array(&$this, 'add_admin_page'));
			add_filter( 'custom_menu_order', array(&$this, 'custom_admin_menu_pages')); 
		}
	}
	
	function add_admin_page() {
		if ( current_user_can('administrator') ) {
			add_submenu_page( 
				$this->page_name, // slug
				__('Board Votes', 'abana'), 
				__('Board Votes', 'abana'), 
				'can_approve_members', // cap
				$this->page_name."_sub", // slug
				array(&$this, 'member_approval_page') // func to ouput html
			);
		} else {
			remove_menu_page('link-manager.php');
			remove_menu_page('tools.php');
			remove_menu_page('edit.php');
			remove_menu_page('edit-comments.php');
		}
	}
	
	function custom_admin_menu_pages($order) {
		if (!$order) return true;
		return array(  
			'index.php', 
			'separator1', 
			'edit.php', 
			'edit.php?post_type=page', 
			'upload.php', 
			'edit.php?post_type=slide',
			'edit.php?post_type=news',
			'edit.php?post_type=leader',
			'edit.php?post_type=job',
			'edit.php?post_type=offer',
			'edit.php?post_type=event',
			'link-manager.php', 
			'separator2', 
			'themes.php', 
			'plugins.php', 
			'users.php', 
			'tools.php', 
			'options-general.php',
			'separator-last', 
		);  
	}  

	function rolescheck() {
		if ( $this->reset_roles === TRUE ) {
			remove_role('board');
			remove_role('student');
			remove_role('individual');
			remove_role('institution');
			remove_role('pending');
		} 
		$default_caps = array(
			'read' => false,
			'upload_files' => false,
			'manage_options' => false,
			'manage_individuals' => false,
			'is_approved_member' => false,
			'can_approve_members' => false,
		);
		if ( current_user_can('administrator') && get_user_meta(get_current_user_id(), 'abana_admin_upgraded', true) != "3.0") {
			$admin = get_role('administrator');

			// upgrade admin user for theme
			if (! current_user_can('manage_options') ) $admin->add_cap('manage_options');
			if (! current_user_can('manage_individuals') ) $admin->add_cap('manage_individuals');
			if (! current_user_can('is_approved_member') ) $admin->add_cap('is_approved_member');
			if (! current_user_can('can_approve_members') ) $admin->add_cap('can_approve_members');
			
			update_user_meta(get_current_user_id(), 'abana_admin_upgraded', "3.0");
		}
		if (! get_role( 'pending' ) ) {
			add_role('pending', 'Pending Approval', $default_caps);
		}
		$default_caps['read'] = true;
		$default_caps['is_approved_member'] = true;
		$default_caps['upload_files'] = true;
		if (! get_role( 'student' ) ) {
			add_role('student', 'Student', $default_caps);
		}
		if (! get_role( 'individual' ) ) {
			add_role('individual', 'Individual', $default_caps);
		}
		$default_caps['manage_individuals'] = true;
		if (! get_role( 'institution' ) ) {
			add_role('institution', 'Institution', $default_caps);
		}
		$default_caps['can_approve_members'] = true;
		if ( get_role( 'board' ) ) {
			remove_role('board');
		}

	}

	function member_approval_page(){
	
	}
}

new WP_Admin_Pages();