Hello, I customized my sale.order adding some fields by a custom module. I need to create a new menu item which it shows the typical tree list with only this fields that I added, but I need also the form view with this new fields when I click in the row that I want to modify.

I did this xml:

<openerp>
    <data>
        <record id="view_commission_commercial_liquidacion_tree" model="ir.ui.view">
            <field name="name">commission.commercial.liquidacion.tree</field>
            <field name="model">sale.order</field>
            <field name="type">tree</field>
            <field name="arch" type="xml">
                    <tree string="Comisiones">
                        <field name="importe_total" select="1"  />
                        <field name="importe1" select="1"  />
                        <field name="fecha1" select="1"  />
                        <field name="estado1" select="1"  />
                        <field name="importe2" select="1"  />
                        <field name="fecha2" select="1"  />
                        <field name="estado2" select="1"  />
                        <field name="importe_ajuste" select="1"  />
                        <field name="fecha_ajuste" select="1"  />
                        <field name="estado_ajuste" select="1"  />
                    </tree>
            </field>
        </record>
        <record id="view_commission_commercial_liquidacion_form" model="ir.ui.view">
            <field name="name">commission.commercial.liquidacion.form</field>
            <field name="model">sale.order</field>
            <field name="type">form</field>
            <field name="arch" type="xml">
                <form string="Liquidación">
                    <field name="importe_total" select="1"/>
                    <field name="importe1" select="1"/>
                    <field name="fecha1" select="1"/>
                    <field name="estado1" select="1"/>
                    <field name="importe2" select="1"/>
                    <field name="fecha2" select="1"/>
                    <field name="estado2" select="1"/>
                    <field name="importe_ajuste" select="1"/>
                    <field name="fecha_ajuste" select="1"/>
                    <field name="estado_ajuste" select="1"/>
                    <field name="commercial_id" select="1"/>
                </form>
            </field>
        </record>
        <record model="ir.actions.act_window" id="open_view_commission_commercial_liquidacion_tree">
            <field name="name">Liquidaciones</field>
            <field name="res_model">sale.order</field>
            <field name="view_type">tree</field>
            <field name="view_mode">tree,form</field>
            <field name="view_id" ref="view_commission_commercial_liquidacion_tree"/>
        </record>
        <menuitem name="Comisiones" parent="base.menu_base_partner" id="menu_commission_commercial_liquidacion_open_view"/>
        <menuitem name="Liquidación" parent="menu_commission_commercial_liquidacion_open_view" id="menu_commission_commercial_liquidacion_open_view_list" action="open_view_commission_commercial_liquidacion_tree"/>
    </data>
</openerp>

With this xml, it appears my custom list but without search box, and I need it, and when you click on form view (not clicking on the row, but on the form icon), it appears the original view of sale.order. I don't know how link my custom form view.

Somebody could help me, please?

Thank you in advance.