partner-contact/better_zip/security/security.xml

<openerp>
    <data>
        <record id="ir_model_access_betterzip0" model="ir.model.access">
            <field name="model_id" ref="better_zip.model_res_better_zip"/>
            <field eval="1" name="perm_read"/>
            <field eval="'better_zip'" name="name"/>
            <field eval="1" name="perm_unlink"/>
            <field eval="1" name="perm_write"/>
            <field eval="1" name="perm_create"/>
            <field name="group_id" ref="base.group_user"/>
        </record>
    </data>
</openerp>