crm_view.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>

        <record id="crm_hear_about_us_tree" model="ir.ui.view">
            <field name="name">crm.hear.about.us.tree</field>
            <field name="model">crm.hear.about.us</field>
            <field name="arch" type="xml">
                <tree string="Hear about us">
                    <field name="sequence" widget="handle"/>
                    <field name="name"/>
                    <field name="type"/>
                </tree>
            </field>
        </record>

        <record id="crm_hear_about_us_form" model="ir.ui.view">
            <field name="name">crm.hear.about.us.form</field>
            <field name="model">crm.hear.about.us</field>
            <field name="arch" type="xml">
                <form string="Hear about us">
                    <group>
                        <field name="name"/>
                        <field name="sequence"/>
                        <field name="type"/>
                        <field name="affiliate"/>
                        <field name="other"/>
                    </group>
                </form>
            </field>
        </record>

        <record id="crm_hear_about_us_action" model="ir.actions.act_window">
            <field name="name">Hear about us</field>
            <field name="res_model">crm.hear.about.us</field>
            <field name="view_type">form</field>
            <field name="view_mode">tree,form</field>
        </record>

        <menuitem action="crm_hear_about_us_action" id="menu_crm_hear_about_us"
            parent="base.menu_crm_config_lead" sequence="10"/>

        <record model="ir.ui.view" id="crm_lead_hear_about_us_form">
            <field name="name">CRM - Leads hear about us Form</field>
            <field name="model">crm.lead</field>
            <field name="inherit_id" ref="crm.crm_case_form_view_leads"/>
            <field name="priority">30</field>
            <field name="arch" type="xml">
                <field name="referred" position="after">
                    <field name="hear_about_us_id" options='{"no_open": True, "no_create": True}'/>
                </field>
            </field>
        </record>

        <record model="ir.ui.view" id="crm_opportunity_hear_about_us_form">
            <field name="name">CRM - Opportunities hear about us Form</field>
            <field name="model">crm.lead</field>
            <field name="inherit_id" ref="crm.crm_case_form_view_oppor"/>
            <field name="priority">30</field>
            <field name="arch" type="xml">
                <field name="referred" position="after">
                    <field name="hear_about_us_id" options='{"no_open": True, "no_create": True}'/>
                </field>
            </field>
        </record>

    </data>
</openerp>