Update data file - odoo

Question

(version 9)
i need to update odoo/openerp/addons/base/res/res_currency_data.xml file
i created module added field to res.currency and added data file in my modules data folder. but my field is not updating. any suggestions?
from openerp import models, fields
class ResCurrency(models.Model):
_inherit = 'res.currency'
currency_word = fields.Char(translate=True, help='HELP')
and this is my data xml file.
<?xml version="1.0" encoding="utf-8"?>
<openerp>
<data noupdate="0">
<!-- Currencies -->
<record id="base.USD" model="res.currency">
<field name="currency_word">Dollars</field>
</record>
</data>
</openerp>
and xml for field to show up in form view.
<openerp>
<data>
<record id="view_currency_form" model="ir.ui.view">
<field name="name">res.currency.form</field>
<field name="model">res.currency</field>
<field name="inherit_id" ref="base.view_currency_form"/>
<field name="arch" type="xml">
<field name="name" position="after">
<field name="currency_word"/>
</field>
</field>
</record>
</data>
</openerp>

Answer 1

this is a workaround for noupdate=1
<function name="write" model="ir.model.data">
<function name="search" model="ir.model.data">
<value eval="[('module', '=', 'base'), ('name', '=', 'USD')]" />
</function>
<value eval="{'noupdate': False}" />
</function>
<record id="base.USD" model="res.currency">
<field name="currency_word">Dollars</field>
</record>
<function name="write" model="ir.model.data">
<function name="search" model="ir.model.data">
<value eval="[('module', '=', 'base'), ('name', '=', 'USD')]" />
</function>
<value eval="{'noupdate': True}" />
</function>