ChiliPepperWeb:
To both questions above, the answer is yes. I did upload the files that were not merged (all of them), and I did rename the folders that required it. I may not be a code expert, but this is not my first time around the block working with PHP/MySQL applications, or Zen Cart for that matter. I just don't know enough to solve this problem on my own, and I haven't found anyone else who's already done it.
As I have said before, questions are asked to ensure we have the correct information needed before providing advice or suggestions. It keeps us from lobbing random answers at folks, and speaking for myself I won't spend time guessing what has or hasn't been done before answering a question on this forum.. Also the most common reason add-ons fail to work is from faulty installs. (this has NOTHING to do with experience or skill level.. a bad install can happen to anyone -- as evidenced by my own support question in this same thread not even a few weeks ago)
That said I just took a look at your site again and realized that your Template Monstrosity template is a possible source of your issues.. TM designers have a nasty habit of slashing out code the designer deems unnecessary in order to force their designs to look pretty.. (every last one of their designs does not require half the crap they do to achieve the design)
You might want to take a look t your template files (the original ones) and see if the good folks at Template Monstrosity have overwritten one of more of the checkout pages. If they have, in doing so they may have removed code COWOA needs to work correctly..
My Site - Zen Cart & WordPress integration specialist
I don't answer support questions via PM. Post add-on support questions in the support thread. The question & the answer will benefit others with similar issues.