Inherit a parent Menu OpenErp

[elsasser]

I would like to have my module menu "nested" inside Purchase Orders in the OpenErp's Purchase App.Right now my module has the following statements (The parent being itself)\[code\]<menuitem id="certificados_parent" name="Certificados" icon="terp-partner"/><menuitem id="menu_certificados_parent" name="Manejo de los certificados" parent="certificados_parent"></menuitem><menuitem action="action_certificados_certificados" id="menu_certificados_certificados" parent="menu_certificados_parent" string="Result"/>\[/code\]This is the code from my form tree\[code\]<record id="student_certificados_form" model="ir.ui.view"> <field name="name">certificados.result.form</field> <field name="model">certificados.certificados</field> <field name="type">form</field> <field name="arch" type="xml"> <form string="Introducir los datos" > <field name="Codigo Arancelario" /> <field name="Descripcion Arancelaria" /> <field name="Especificaciones Tecnicas" /> <field name="Cantidad" /> <field name="Precio Unitario Declarado" /> <field name="Valor En Divisas" /> </form> </field></record>\[/code\]On the other hand i see this parent form code in a view from another module "purchase Requisition"(purchase_requisition_view.xml)\[code\]<record model="ir.ui.view" id="purchase_order_form_inherit"> <field name="name">purchase.order.form.inherit</field> <field name="model">purchase.order</field> <field name="inherit_id" ref="purchase.purchase_order_form"/> <field name="arch" type="xml"> <field name="validator" position="before"> <field name="requisition_id"/> </field> </field></record>\[/code\]What should i do to accomplish this task, is the product requisition code a clue?Any help would be very appreciated, thanks in advance.