Modify Product Alpha Listing Sorter dropdown menu

This is an 'offshoot' from my other question, as I think the other question about Sort By was misleading.

What I really want to do is change the Product Alpha Listing Sorted Dropdown so that the selections are not Alphanumeric but are instead the same options as offered when viewing All Products, those being Product Name, Product Name - desc, Price- low to high,
etc.

How do I do that?

I have been looking at the following two PHP files;
product_listing_alpha_sorter.php and
tpl_modules_listing_display_order.php

The first (alpha sorter) generates the default alpha list for the
Sort By drop down menu, and the second generates the
drop down menu for All Products. The second is the menu that I
want to use in place of the alpha sorter.

Here is my question: If I replace the code in
product_listing_alpha_sorter.php with the code from
tpl_modules_listing_display_order.php am I likely to cause
problems with the rest of the program?

Of course I will first make a backup of the alpha_sorter code.

Any help out there?

By changing the code, I got the drop down menu to display the
selections I want, but it doesn't do anything.

Obviously quite a bit more to it than what I last proposed, since that
change by itself did not work. I think I have to figure out how to get
the selected item (eg Price low to high) to be executed by the
listing_display_order.php code. HMMM!

Would appreciate some help from a guru!

Thanks.

FOUND THE SOLUTION

http://www.zen-cart.com/forum/showthread.php?t=56118&highlight=sort+yellow&page=3

Thanks to yellow1912

Thanks for this! Was looking everywhere ;)

there is a mod for this
http://www.zen-cart.com/showthread.php?205606-Product-Listing-Sorter-Drop-Down