Hi Martin.

You could use a http interceptor and replace umbraco's create.html with your own, without having to make any changes to the original create.html.

angular.module('umbraco.services').config([
    '$httpProvider',
    function ($httpProvider) {
        $httpProvider.interceptors.push(function ($q) {
            return {
                'request': function (request) {
                    if (request.url.startsWith("views/content/create.html")) {
                        request.url = "../path/to/your/own/create.html";
                    }
                    return request || $q.when(request);
                }
            };
        });
    }
]);