I'm currently trying to modify my rewrites to allow for an additional URL segment e.g. http://example.com/vendors/username/ by default WP allows for additional numeric segments but everything else returns a 404 error. e.g. http://example.com/vendors/test. I'm curious as how I would go about allowing URL's like these.
But it still has to serve the original page: http://example.com/vendors/username/
I've previously examined this article, but still couldn't sort it out: http://www.hongkiat.com/blog/wordpress-url-rewrite/