purchase_group_orders_view.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
  <data>
    <record id="view_purchase_order_group_shop_carrier" model="ir.ui.view">
      <field name="name">Merger Purchase Orders</field>
      <field name="model">purchase.order.group</field>
      <field name="inherit_id" ref='purchase.view_purchase_order_group'/>
      <field name="type">form</field>
      <field name="arch" type="xml">
        <xpath expr="/form/label" position="replace">
                    <label string="
Please note that: &#10; &#10;
Orders will only be merged if: &#10;
 * Purchase Orders are in draft &#10;
 * Purchase Orders belong to the same supplier &#10;
 * Purchase Orders are have same stock location, same pricelist &#10;
 * Purchase Orders have been generated from Sale Orders issued by the same Shop, and having the same Carrier &#10; &#10;
Lines will only be merged if: &#10;
 * Order lines are exactly the same except for the product,quantity and unit &#10;
" colspan="4"/>
        </xpath>
      </field>
    </record>

    <record id="purchase_order_form_shop_carrier" model="ir.ui.view">
      <field name="name">purchase.order.form</field>
      <field name="model">purchase.order</field>
      <field name="type">form</field>
      <field name="inherit_id" ref='purchase.purchase_order_form'/>
      <field name="arch" type="xml">
        <field name="company_id" position="after">
          <field name="shop_id" readonly="1" />
          <field name="carrier_partner_id" readonly="1" />
        </field>
      </field>
    </record>
  </data>
</openerp>