sale_view.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  product_is_a_gift for OpenERP
  Copyright (C) 2011 Akretion Sébastien BEAU <sebastien.beau@akretion.com>
  The licence is in the file __openerp__.py
-->

<openerp>
    <data>
    
        <!-- INHERITED VIEW FOR THE OBJECT : sale_order -->

		<record id="view_order_form" model="ir.ui.view">
			<field name="name">product_is_a_gift.view_order_form</field>
			<field name="model">sale.order</field>
			<field name="inherit_id" ref="sale.view_order_form" />
			<field name="type">form</field>
			<field name="arch" type="xml">
				<data>
					<xpath expr="/form/notebook/page[@string='Other Information']/separator[@string='Notes']" position="before">
                        <separator string="Gift Message" colspan="4"/>
                        <field name="gift_message" colspan="4" nolabel="1"/>
					</xpath>

					<xpath expr="/form/notebook/page/field[@name='order_line']/form/notebook/page[@string='Order Line']/group/field[@name='product_packaging']" position="after">
						<field name="need_gift_wrap" />
					</xpath>

					<xpath expr="/form/notebook/page/field[@name='order_line']/form/notebook/page[@string='Extra Info']" position="after">
                        <page string="Gift Message">
                            <field name="gift_message" colspan="4" nolabel="1"/>
                        </page>
					</xpath>

					<xpath expr="/form/notebook/page/field/tree/field[@name='name']" position="after">
						<field name="need_gift_wrap" />
					</xpath>
				</data>
			</field>
		</record>

    </data>
</openerp>