How to piece together a SOAP_Value object, Dyn/Lit request

Hi Maybe someone can steer me in the right direction. I am trying to make soap request using PEAR::SOAP to a Dynamic/Literal type soap server that has no WSDL. This accommodations server has plenty of services and I'd like to build an extensible way to make different requests through PEAR::SOAP. My idea was to have a base soap_value which contains the base xml tree structure required for a legal request (authentication etc.) and then insert another soap_value with a specific request into the base soap_value tree, all SOAP_Value(s) being objects. Then, of course, send the request with the updated SOAP_Value. Does anyone know if there is something built into PEAR::SOAP that can help with this? Or do I need to figure out how to loop through the soap_value object to insert the extended request? Or I am I going about this the wrong way? I am new to objects and any help would greatly be appreciated. Regards, Roland