I have come across a repeating instuction, included in the install.txt, for this contribution....as follows
6. Approximately at lines 579-585,
>>> FIND THIS:
<tr>
<td colspan="2"><?php echo tep_draw_separator('pixel_trans.gif', '1', '10'); ?></td>
</tr>
<tr>
<td class="main"><?php echo TEXT_PRODUCTS_WEIGHT; ?></td>
<td class="main"><?php echo tep_draw_separator('pixel_trans.gif', '24', '15') . ' ' . tep_draw_input_field('products_weight', $pInfo->products_weight); ?></td>
</tr>
>>> ADD THE FOLLOWING 7 LINES *AFTER* THE ABOVE:
<tr>
<td colspan="2"><?php echo tep_draw_separator('pixel_trans.gif', '1', '10'); ?></td>
</tr>
<tr>
<td class="main"><?php echo TEXT_EDIT_SORT_ORDER; ?></td>
<td class="main"><?php echo tep_draw_separator('pixel_trans.gif', '24', '15') . ' ' . tep_draw_input_field('products_sort_order', $pInfo->products_sort_order, 'size="2"'); ?></td>
</tr>
This is repeated twice.......which means you end up with two sort tick boxes in admin product edit area.....
Watch out for this......