i am installing tabels for my module can i declare two classes? if not how to i combine both?

<global>
    <resources>
        <name_module_setup>
            <setup>
                <module>Name_module</module>
                <class>Mage_Core_Model_Resource_Setup</class>
                <class>Mage_Catalog_Model_Resource_Setup</class>
            </setup>
        </name_module_setup>
    </resources>
</global>