As given in the link http://angular-ui.github.io/bootstrap ( select modal from Directive drop down on top), there is a parameter called windowTemplateUrl which is used to over
windowTemplateUrl is a template for window decoration: https://github.com/angular-ui/bootstrap/blob/master/template/modal/window.html
windowTemplateUrl
You still need to supply modal's content (using template or templateUrl) that you would like to see decorated.
template
templateUrl