diff --git a/.gitignore b/.gitignore
index 2731c8f..ba797f1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@
 *.coverage
 oca.egg*
 .tox
+.idea
\ No newline at end of file
diff --git a/oca/__init__.py b/oca/__init__.py
index 3582129..3d827b1 100644
--- a/oca/__init__.py
+++ b/oca/__init__.py
@@ -16,6 +16,7 @@
 from exceptions import OpenNebulaException
 from cluster import Cluster, ClusterPool
 from datastore import Datastore, DatastorePool
+from zone import Zone, ZonePool
 
 
 CONNECTED = -3
@@ -119,7 +120,7 @@ def call(self, function, *args):
             #connection error
             raise e
         if not is_success:
-            raise OpenNebulaException(data)
+            raise OpenNebulaException(data, return_code)
         return data
 
     def version(self):
@@ -132,5 +133,5 @@ def version(self):
         VirtualMachinePool, User, UserPool,
         Image, ImagePool, VirtualNetwork, VirtualNetworkPool,
         Group, GroupPool, VmTemplate, VmTemplatePool, ALL, CONNECTED,
-        Cluster, ClusterPool, Datastore, DatastorePool]
+        Cluster, ClusterPool, Datastore, DatastorePool, Zone, ZonePool]
 
diff --git a/oca/exceptions.py b/oca/exceptions.py
index c308d45..41d0b57 100644
--- a/oca/exceptions.py
+++ b/oca/exceptions.py
@@ -2,5 +2,6 @@
 
 
 class OpenNebulaException(Exception):
-    pass
-
+    def __init__(self, data, return_code):
+        self.return_code = return_code
+        super(OpenNebulaException, self).__init__(data)
diff --git a/oca/pool.py b/oca/pool.py
index 422dc01..e526255 100644
--- a/oca/pool.py
+++ b/oca/pool.py
@@ -13,7 +13,7 @@ class WrongIdError(OpenNebulaException):
     pass
 
 def extractString(xml_or_string):
-    if isinstance(xml_or_string, str):
+    if isinstance(xml_or_string, basestring):
         return xml_or_string
     else:
         return xml_or_string.text or ''
@@ -53,7 +53,7 @@ def __init__(self, xml=None):
 
     def _initialize_xml(self, xml, root_element):
         hidden_character=u"\u200b"
-        self.xml = ET.fromstring(xml.replace(hidden_character,""))
+        self.xml = ET.fromstring(xml.replace(hidden_character,"").encode("utf-8"))
         if self.xml.tag != root_element.upper():
             self.xml = None
         self._convert_types()
diff --git a/oca/template.py b/oca/template.py
index 531b81b..7de3998 100644
--- a/oca/template.py
+++ b/oca/template.py
@@ -21,7 +21,7 @@ class VmTemplate(PoolElement):
             'uname'       : str,
             'gname'       : str,
             'regtime'     : int,
-            'template'    : ['TEMPLATE', Template]
+            'template'    : ['TEMPLATE', Template, ['DISK', 'OS', 'NIC', 'GRAPHICS', 'CONTEXT']]
     }
 
     ELEMENT_NAME = 'VMTEMPLATE'
@@ -76,14 +76,16 @@ def chown(self, uid=-1, gid=-1):
         '''
         self.client.call(VmTemplate.METHODS['chown'], self.id, uid, gid)
 
-    def instantiate(self, name=''):
+    def instantiate(self, name='', hold=False, extra_template=''):
         '''
         Creates a VM instance from a VmTemplate
 
         ``name``
             name of the VM instance
         '''
-        self.client.call(VmTemplate.METHODS['instantiate'], self.id, name)
+        # id = self.client.call(VmTemplate.METHODS['instantiate'], self.id, name)
+        id = self.client.call(VmTemplate.METHODS['instantiate'], self.id, name, hold, extra_template)
+        return id
 
     def __repr__(self):
         return '<oca.VmTemplate("%s")>' % self.name
diff --git a/oca/vm.py b/oca/vm.py
index 765be98..86db87b 100644
--- a/oca/vm.py
+++ b/oca/vm.py
@@ -18,6 +18,7 @@ class VirtualMachine(PoolElement):
         'delete':    'vm.delete',
         'chown':     'vm.chown',
         'update':    'vm.update',
+        'rename':    'vm.rename',
     }
 
     INIT = 0
@@ -92,7 +93,7 @@ class VirtualMachine(PoolElement):
         'stime':         int,
         'etime':         int,
         'deploy_id':     extractString,
-        'template':      ['TEMPLATE', Template, ['NIC', 'DISK']],
+        'template':      ['TEMPLATE', Template, ['NIC', 'DISK', 'GRAPHICS']],
         'user_template': ['USER_TEMPLATE', Template],
         'history_records':  ['HISTORY_RECORDS', lambda x: [History(i)
                                         for i in x] if x is not None else []],
@@ -248,6 +249,20 @@ def delete(self):
         '''
         self._action('delete')
 
+    def rename(self, name):
+        '''
+        Rename the VM.
+        '''
+        data = self.client.call(self.METHODS['rename'], self.id, name)
+        return data
+
+    def action(self, action):
+        '''
+        submits an action to be performed on a virtual machine.
+        '''
+        data = self.client.call(self.METHODS['action'], action, self.id)
+        return data
+
     def _action(self, action):
         self.client.call(self.METHODS['action'], action, self.id)
 
diff --git a/oca/zone.py b/oca/zone.py
new file mode 100644
index 0000000..f4f9d5c
--- /dev/null
+++ b/oca/zone.py
@@ -0,0 +1,35 @@
+# coding: utf-8
+from pool import Pool, PoolElement, Template, extractString
+
+
+class Zone(PoolElement):
+    METHODS = {
+    }
+
+    XML_TYPES = {
+        'id': int,
+        'name': extractString,
+        'template': ['TEMPLATE', Template],
+    }
+
+    ELEMENT_NAME = 'ZONE'
+
+    def __init__(self, xml, client):
+        super(Zone, self).__init__(xml, client)
+        self._convert_types()
+
+    def __repr__(self):
+        return '<oca.Zone("%s")>' % self.name
+
+
+class ZonePool(Pool):
+    METHODS = {
+        'info': 'zonepool.info',
+    }
+
+    def __init__(self, client):
+        super(ZonePool, self).__init__('ZONE_POOL', 'ZONE', client)
+
+    def _factory(self, xml):
+        c = Zone(xml, self.client)
+        return c
diff --git a/setup.py b/setup.py
index f7f83d4..ed97fa7 100644
--- a/setup.py
+++ b/setup.py
@@ -1,5 +1,5 @@
 # -*- coding: UTF-8 -*-
-__version__ = '4.15.0a1'
+__version__ = '4.15.anjuke16'
 
 import os