How do I change redmine's default layout in a plugin?

Hello everyone!

Is there a way to change the default Redmine layout using render :layout => "alternative_layout"? Where should I put the layout file? (must be inside the plugin, not in Redmine's root dirs).

I want to override the default layout because I'm doing a view in a plugin that changes multiple values, and the values to be changed will open in a popup window that must contain only the text_field with the values to be changed.