None of the other forum queries & responses had the answer I needed. Most solved the problem themselves.
I installed this code in my theme's index.php as instructed right before the loop:
I'm not sure if I have to do anything with the other line:
<?php get_posts('orderby=menu_order&order=ASC'); ?>
Does anyone have a sense where I need to place this or if there's something else I have to do to activate postMash?? Thanks!