I have no intention of officially supporting this approach, but you could try changing this to read " if (true) {" instead of the if...=rows it uses presently:
https://github.com/zencart/zencart/b...ng.php#L39-L40

You will probably have a bunch of display issues to sort out.

It would likely be more user-friendly to offer a dropdown selector but that is a lot more complicated to implement.