Boo,
Check out this little thread to help you..

http://www.zen-cart.com/forum/showthread.php?t=122516

Notice #6, on how Ajeh uses Install SQL Patches,

  1. You will use this:
  2. UPDATE products SET products_quantity_order_max = XX;
  3. Read post #6 for the XX value

Make sure to make a backup of your database before this procedure, if you make a mistake you can load the original database back