From the behavior of your test store, it looks like you might not have uploaded the /includes folder. There's an IntegratedCOWOA/includes/, an IntegratedCOWOA/overwrites-rides/includes/, and an IntegratedCOWOA/overwrites-rides/admin/ folder to upload. You mention the two folders in the overwrites-rides folder, but did you get the top level includes/?
This gets back to the issue of me figuring out a less confusing installation. (;