Rwrite url by xml file in magento

first you go to yourmodule/etc/config.xml paste this code between  <global> </global>
 tag :-

<global>
<rewrite>
            <customer_account_create>
                <from><![CDATA[#^/account/create/#]]></from>which url is you wants
                <to>/customer/account/create/</to>//current url
                <complete>1</complete>
            </customer_account_create>
        </rewrite>

</global>

how to change  module name  from url :-

<routers>
            <customer>
                <use>standard</use>
                <args>
                    <module>Mage_Customer</module>
                    <frontName>customer</frontName>//for example change the front name cutomer to user.
                </args>
            </customer>
        </routers>