I have always been of the opinion that the usual way in which osCommerce shows the “also purchased” is a bit flawed.
Usually it is simply shown on the product_info page, at all times – and is a list of other products that buyers have bought at the same time…example.
With some thinking, I moved it into the “you’ve added box“. So that it now looks like this;
So, now the buyer gets the “also purchased” items as part of the action they just took, rather than something which could possibly stop them buying the item they are looking at.
Seems to work very well, and has already been proven to increase sales! If you want/need something similar, email me for a quote.