I updated this mod and submitted it today!
http://www.zen-cart.com/downloads.php?do=file&id=496

What does it do?


This mod puts link(s) or a dropdown on the product listing page (only) to allow your customers to choose the maximum number of products to be displayed per page.

Additions to v1.2

1.) Added Admin Control
The new admin control gives you a Display Option (Display Dropdown) = true, simply set to false to use as Number List

2.) Removed optional functions file (for Dropdown)
Merged function files to include an if statement based on ADMIN > PRODUCT LISTING > Display Option

3.) Added an additional Upgrade sql file to add the new ADMIN switch

4.) Updated and hopefully simplified the readme.html file

Requirement

You need this mod installed first:
Column Layout Grid for Product Listing http://www.zen-cart.com/downloads.php?do=file&id=3