This is a great story, thanks to John Ferguson (www.johnferguson.co.uk/) for sharing this story with me when we met by chance in London.
However I don't believe in chance, it was meant to be. John was told as a black kid you can't play as a cowboy as that was what white people did, no black people were cowboys, you can only be... an Indian.
While in NY he saw some black cowboys in a parade and thought it was strange to see this until he spoke with them. They were in fact real cowboys. This is how his project and this film trailer came to be.