Here's basically the scenario.
All products of all categories have one price to follow. Say, $2.
Except for one product, the customized product. The category it belongs has no other product except it. And it's worth, say, $20.
Now my problem is, how do I set a typical global quantity discount (using that downloadable module or something else) to all products except that customized one?
I tried changing lines inside ot_qty_discount.php but I am still confused.
Will appreciate anything.