Top level menu to list pages and categories – change order

I am trying to create a top level menu to list the following:

-Home (page / id7)
-Exhibitions (category)
-Commissions (category)
-Music Promo’s (page / id6)
-Shop (page / id4)
-About (page / id2)

To achieve this, I feel this will do it:

<ul>
<?php wp_list_pages('title_li='); ?>
<?php wp_list_categories('depth=1&title_li='); ?>
</ul>

However, this lists the menu as such:

-Home (page)
-Music Promo’s (page)
-Shop (page)
-About (page)
-Exhibitions (category)
-Commissions (category)

I want to list them in my desired order. So I am doing this:

<ul>
<?php wp_list_pages('depth=1&exclude=6,4,2&sort_column=menu_order&title_li='); ?>
<?php wp_list_categories('depth=1&orderby=ID&title_li='); ?>
<?php wp_list_pages('depth=1&exclude=7&sort_column=menu_order&title_li='); ?>
</ul>

This works, but doesn’t seem right – I don’t want to repeat wp_list_pages twice, and go through all the excludes.

Is there a simpler way of doing this?

Thanks