Easy way to have a seperate conroller and template for kendo Windows with AngularJS. see here: https://github.com/kjartanvalur/angular-kendo-window
Thanks for posting your solution in our portal, Kjartan. You may also consider submitting it in the code library section on telerik.com: http://www.telerik.com/support/code-library/kendo-ui (in the Kendo UI Window section)