Ashish, regarding the error messages, one hacky way to achieve this would be to add a CSS rule to the page that prevents the page problems container element from ever displaying — I don’t recommend this but if you’re desperate, you could do this.
There’s no good way to intercept a declaratively-defined Model and adjust its XML before it gets queried on initial page load. Your only real alternative would be to dynamically generate the Models with JavaScript, and then query them.
