Default System Config Values in config.xml

To set default values for system config items use the following:

<config>
    <default>
        <shipnote_options>
            <basic_settings>
                <enabled>1</enabled>
                <frontend_label>Salesman Code</frontend_label>
            </basic_settings>
        </shipnote_options>
    </default>
</config>

For a Store:

<config>
    <stores>
        <store_code>
            <shipnote_options>
                <basic_settings>
                    <enabled>1</enabled>
                    <frontend_label>Salesman Code</frontend_label>
                </basic_settings>
            </shipnote_options>
        </store_code>
    </stores>
</config>

For a Website:

<config>
    <websites>
        <store_code>
            <shipnote_options>
                <basic_settings>
                    <enabled>1</enabled>
                    <frontend_label>Salesman Code</frontend_label>
                </basic_settings>
            </shipnote_options>
        </store_code>
    </websites>
</config>