app_design_adminhtml_default_default_layout_organicinternet_wysiwygeditor.xml

<?xml version="1.0"?>
<layout version="0.0.1">
    <default>
        <reference name="head">
            <action method="setTemplate"><template>organicinternet_wysiwygeditor/page_head.phtml</template></action>
        </reference>
    </default>
</layout>