diff --git a/application/controllers/ProcessController.php b/application/controllers/ProcessController.php
index 9647aaa..8225297 100644
--- a/application/controllers/ProcessController.php
+++ b/application/controllers/ProcessController.php
@@ -53,6 +53,7 @@ class ProcessController extends Controller
     public function showAction()
     {
         $mode = $this->params->get('mode');
+        $action = $this->params->get('action');
         $unlocked = (bool) $this->params->get('unlocked');
         $this->prepareProcessActions();
         $this->prepareProcess();
@@ -117,7 +118,7 @@ class ProcessController extends Controller
         } else {
             $renderer = new TreeRenderer($bp, $bpNode);
         }
-        $renderer->setBaseUrl($this->url())
+        $renderer->setUrl($this->url())
             ->setPath($this->params->getValues('path'));
         $this->content()->add($renderer);
         $controls = $this->controls();
@@ -147,6 +148,28 @@ class ProcessController extends Controller
             $renderer->unlock();
         }
 
+        if ($action === 'add') {
+            $this->content()->add(HtmlString::create(
+                (string) $this->loadForm('AddNode')
+                    ->setProcess($bp)
+                    ->setParentNode($bp->getNode($node))
+                    ->setSession($this->session())
+                    ->handleRequest()
+            ));
+        } elseif ($action === 'simulation') {
+            $this->content()->add(HtmlString::create(
+                $this->loadForm('simulation')
+                    ->setSimulation(new Simulation($bp, $this->session()))
+                    ->setNode($node)
+                    ->handleRequest()
+            ));
+        }
+
+        if ($action) {
+            // No autorefresh when showing forms
+            return;
+        }
+
         if ($this->isXhr()) {
             if ($this->params->get('addSimulation')) {
                 $this->setAutorefreshInterval(30);
@@ -206,7 +229,7 @@ class ProcessController extends Controller
             $this->actions()->add(
                 Link::create(
                     $this->translate('Lock'),
-                    $this->url()->without('unlocked'),
+                    $this->url()->without('unlocked')->without('action'),
                     null,
                     array(
                         'class' => 'icon-lock',
diff --git a/application/forms/AddNodeForm.php b/application/forms/AddNodeForm.php
index efc89d6..1627a1b 100644
--- a/application/forms/AddNodeForm.php
+++ b/application/forms/AddNodeForm.php
@@ -30,7 +30,7 @@ class AddNodeForm extends QuickForm
 
     public function setup()
     {
-       $type = $this->selectNodeType();
+        $type = $this->selectNodeType();
         switch ($type) {
             case 'host':
                 $this->selectHost();
diff --git a/application/forms/BpConfigForm.php b/application/forms/BpConfigForm.php
index abf3111..5382673 100644
--- a/application/forms/BpConfigForm.php
+++ b/application/forms/BpConfigForm.php
@@ -167,6 +167,7 @@ class BpConfigForm extends QuickForm
 
             $this->redirectOnSuccess(sprintf('Process %s has been created', $name));
         } else {
+            $config = $this->config;
             if ($title) {
                 $config->setTitle($title);
             }
diff --git a/library/Businessprocess/Controller.php b/library/Businessprocess/Controller.php
index 44da2bb..0ec129c 100644
--- a/library/Businessprocess/Controller.php
+++ b/library/Businessprocess/Controller.php
@@ -100,6 +100,9 @@ class Controller extends ModuleController
         return $this->view->controls;
     }
 
+    /**
+     * @return Content
+     */
     protected function content()
     {
         if ($this->view->content === null) {
diff --git a/library/Businessprocess/Modification/NodeCreateAction.php b/library/Businessprocess/Modification/NodeCreateAction.php
index b47dacb..4d970dc 100644
--- a/library/Businessprocess/Modification/NodeCreateAction.php
+++ b/library/Businessprocess/Modification/NodeCreateAction.php
@@ -5,7 +5,6 @@ namespace Icinga\Module\Businessprocess\Modification;
 use Icinga\Module\Businessprocess\BusinessProcess;
 use Icinga\Module\Businessprocess\BpNode;
 use Icinga\Module\Businessprocess\Node;
-use stdClass;
 
 class NodeCreateAction extends NodeAction
 {
diff --git a/library/Businessprocess/Modification/ProcessChanges.php b/library/Businessprocess/Modification/ProcessChanges.php
index 452bd4a..2adcb25 100644
--- a/library/Businessprocess/Modification/ProcessChanges.php
+++ b/library/Businessprocess/Modification/ProcessChanges.php
@@ -64,6 +64,19 @@ class ProcessChanges
         return $this->push($action);
     }
 
+    /**
+     * @param Node $node
+     * @param $properties
+     *
+     * @return $this
+     */
+    public function addChildrenToNode(Node $node, $children)
+    {
+        $action = new NodeAddChildrenAction($node);
+        $action->setChildren($node, $children);
+        return $this->push($action);
+    }
+
     /**
      * @param Node|string $nodeName
      * @param object $properties
diff --git a/library/Businessprocess/Node.php b/library/Businessprocess/Node.php
index 4c99d35..8ba84f1 100644
--- a/library/Businessprocess/Node.php
+++ b/library/Businessprocess/Node.php
@@ -298,7 +298,7 @@ abstract class Node
             return static::$stateToSortStateMap[$state];
         }
 
-        throw new ProgrammingError('Got invalid state: %s',  var_export($state, 1));
+        throw new ProgrammingError('Got invalid state: %s', var_export($state, 1));
     }
 
     protected function sortStateTostate($sortState)
diff --git a/library/Businessprocess/Renderer/Renderer.php b/library/Businessprocess/Renderer/Renderer.php
index ba3088a..6b87432 100644
--- a/library/Businessprocess/Renderer/Renderer.php
+++ b/library/Businessprocess/Renderer/Renderer.php
@@ -10,7 +10,6 @@ use Icinga\Module\Businessprocess\Html\Container;
 use Icinga\Module\Businessprocess\Html\Element;
 use Icinga\Module\Businessprocess\Html\Html;
 use Icinga\Module\Businessprocess\Html\HtmlString;
-use Icinga\Module\Businessprocess\Html\Text;
 use Icinga\Module\Businessprocess\Node;
 use Icinga\Module\Businessprocess\Web\Url;
 use Icinga\Web\Request;
@@ -26,6 +25,9 @@ abstract class Renderer extends Html
     /** @var bool Administrative actions are hidden unless unlocked */
     protected $locked = true;
 
+    /** @var Url */
+    protected $url;
+
     /** @var Url */
     protected $baseUrl;
 
@@ -162,6 +164,17 @@ abstract class Renderer extends Html
         return $path;
     }
 
+    /**
+     * @param Url $url
+     * @return $this
+     */
+    public function setUrl(Url $url)
+    {
+        $this->url = clone($url);
+        $this->setBaseUrl($url);
+        return $this;
+    }
+
     /**
      * @param Url $url
      * @return $this
@@ -172,6 +185,11 @@ abstract class Renderer extends Html
         return $this;
     }
 
+    public function getUrl()
+    {
+        return $this->url;
+    }
+
     /**
      * @return Url
      * @throws ProgrammingError
diff --git a/test/php/library/Businessprocess/Operators/AndOperatorTest.php b/test/php/library/Businessprocess/Operators/AndOperatorTest.php
index 9436184..8e88c39 100644
--- a/test/php/library/Businessprocess/Operators/AndOperatorTest.php
+++ b/test/php/library/Businessprocess/Operators/AndOperatorTest.php
@@ -138,7 +138,7 @@ class AndOperatorTest extends BaseTestCase
         $p->addChild($host);
         $p->addChild($service);
 
-        $this->assertEquals('DOWN',$host->getStateName());
+        $this->assertEquals('DOWN', $host->getStateName());
         $this->assertEquals('WARNING', $service->getStateName());
         $this->assertEquals('WARNING', $p->getStateName());
     }