[Rahjeir]

I went another route. I replaced TABLE_PREFIX with MERGE_PREFIX and defined it. Though I merged alot more tables then the ones defined here.

For 3.5.X I had to edit the class_dm.php. These are the two stock lines I needed to edit for a 3.5.X. My forums have been running merged for 1 1/2 years now. Only minor issues come up.

class_dm.php(rewrite with your merged value.)
Search for
$return = $this->db_insert(TABLE_PREFIX, $this->table, $doquery);

Search for
$return = $this->db_update(TABLE_PREFIX, $this->table, $this->condition, $doquery, $delayed);

Other then that, the above hack should work.