=== modified file 'purchase/stock.py'
--- purchase/stock.py	2009-05-05 11:00:23 +0000
+++ purchase/stock.py	2010-08-04 07:37:09 +0000
@@ -41,7 +41,7 @@
     _inherit = 'stock.picking'
     _columns = {
         'purchase_id': fields.many2one('purchase.order', 'Purchase Order',
-            ondelete='set null', select=True, readonly=True),
+            ondelete='set null', select=True),
     }
     _defaults = {
         'purchase_id': lambda *a: False,

=== modified file 'purchase/stock_view.xml'
--- purchase/stock_view.xml	2009-01-27 11:33:19 +0000
+++ purchase/stock_view.xml	2010-08-04 09:02:47 +0000
@@ -19,7 +19,35 @@
             id="act_purchase_order_2_stock_picking" 
             name="Packing" 
             res_model="stock.picking" 
-            src_model="purchase.order"/>
+            src_model="purchase.order"
+            context="{'contact_display': 'partner'}"
+            />
+		
+		<record id="action_picking_in_tree_view" model="ir.actions.act_window.view">
+            <field eval="1" name="sequence"/>
+            <field name="view_mode">tree</field>
+            <field name="view_id" ref="stock.view_picking_in_tree"/>
+            <field name="act_window_id" ref="act_purchase_order_2_stock_picking"/>
+        </record>
+        <record id="action_picking_in_form_view" model="ir.actions.act_window.view">
+            <field eval="2" name="sequence"/>
+            <field name="view_mode">form</field>
+            <field name="view_id" ref="stock.view_picking_in_form"/>
+            <field name="act_window_id" ref="act_purchase_order_2_stock_picking"/>
+        </record>
+        
+		<record id="stock_picking_in_inherit_purchase" model="ir.ui.view">
+            <field name="name">Incoming Picking Inherited</field>
+            <field name="model">stock.picking</field>
+            <field name="type">form</field>
+            <field name="inherit_id" ref="stock.view_picking_in_form"/>
+            <field name="arch" type="xml">
+                <field name="backorder_id" position="after">
+                    <field name="purchase_id"/>
+                </field>
+            </field>
+        </record>
+         
         
     </data>
 </openerp>

=== modified file 'sale/stock.py'
--- sale/stock.py	2010-03-23 10:19:47 +0000
+++ sale/stock.py	2010-08-04 07:19:03 +0000
@@ -35,7 +35,7 @@
 class stock_picking(osv.osv):
     _inherit = 'stock.picking'
     _columns = {
-        'sale_id': fields.many2one('sale.order', 'Sale Order', ondelete='set null', select=True, readonly=True),
+        'sale_id': fields.many2one('sale.order', 'Sale Order', ondelete='set null', select=True),
     }
     _defaults = {
         'sale_id': lambda *a: False

=== modified file 'sale/stock_view.xml'
--- sale/stock_view.xml	2008-09-16 13:32:59 +0000
+++ sale/stock_view.xml	2010-08-04 07:22:29 +0000
@@ -13,5 +13,18 @@
             </field>
         </record>
         
+        <!-- Adding Sale Order Reference to outgoing picking -->
+        
+        <record id="stock_picking_out_inherit_sale" model="ir.ui.view">
+            <field name="name">Outgoing picking Inherited</field>
+            <field name="model">stock.picking</field>
+            <field name="type">form</field>
+            <field name="inherit_id" ref="stock.view_picking_out_form"/>
+            <field name="arch" type="xml">
+                <field name="move_type" position="after">
+                    <field name="sale_id"/>
+                </field>
+            </field>
+        </record>
     </data>
 </openerp>