Hi larweb5:
To run the latest custom outings you will need all the fish, sound and food files. Can you please upload your "content_errors.txt" found in your main RWFF folder and I will try to figure out what is missing in your RWFF install and I can send you the files that you need for Mighty Yellowstone to work?
As the Mighty Yellowstone was a pretty early outing, all you would need are the basic food and sound files that came with your original RWFF install, and maybe a couple of fish files. The later outings are much more complex and will need all the latest food, fish and sound files to work.
Anyway after you upload your "content_errors.txt" file we will be able to figure things out pretty quickly.
Regards,
Stanley