Difficulty trying to integrate "Add Multi Products Revi

[earth-friendly]

I'm trying to integrete the contribution "Add Multi Products Revived" into osCMax. This is at: http://www.oscommerce.com/community/contributions,3022/

Basically, it seems to replace
includes/modules/product_listing.php with a new file: product_listing_multi.php.
I tried installing it, and nothing happened.
I'm suspecting that in osCMax, product_listing.php is not used, and has been replaced with product_listing_col.php.

Basically, I want to offer about 6 products in a category, and I want customers to be able to put a quantity next to the products they want, and then click a single button to add all the products to the cart at once.
Could anyone please either recommend a contribution that I can use to accomplish this, or make suggestions on how I would modify the code to do this myself?

Thanks very much for any help with this!

Regards,
-Lori-

[earth-friendly]

I just found this contribution--would this be the one I need?
http://www.oscommerce.com/community/contributions,3606
It is: Add Multiple Products to Cart, in columns, for SPPC.

Thanks for any help with this!
Regards,
-Lori-

[michael_s]

You can switch between product_listing.php and product_listing_col.php in the admin under Configuration product listing

[earth-friendly]

Michael,
Thanks for getting back to me!
So far, I've had no luck with getting this contribution to work.
In includes/filenames.php, I changed
define('CONTENT_PRODUCT_LISTING', 'product_listing');
to
define('CONTENT_PRODUCT_LISTING', 'product_listing_multi');
as part of the contribution.
Then, based on your suggestion, in the admin, I changed
Configuration -> Product listing
so that Product Display Type is 0, since I'm assuming that that goes with the CONTENT_PRODUCT_LISTING, which I set to "product_listing_multi.php".

Anyway, nothing changed when I listed my products.

I also tried changing
define('FILENAME_PRODUCT_LISTING_COL', 'product_listing_col.php');
to point to 'product_listing_multi.php' instead of 'product_listing_col.php'
but that didn't change any of the behavior.

Or, would a different contribution have a better chance of success?
I've seen many similar ones, and I'm confused about which way to go.
There are the following:

Column Product Listing (for Separate Pricing Per Costomer v4.0)
http://www.oscommerce.com/community/contributions,3007

and

Add Multiple Products to Cart, in columns, for SPPC.
http://www.oscommerce.com/community/contributions,3606

I think I will still have to deal with the issue of changing
FILENAME_PRODUCT_LISTING_COL vs.
CONTENT_PRODUCT_LISTING

Thanks so much for any help with this!

Regards,
-Lori-