Hi,
You need first to generate WSDL files with UDFs: launch the WsdlServiceGenerator tool provided with B1WS, make it connects to the database you want to update and generate wsdl.
Once files are generated, you need to copy them from the tool folder to the B1WS directory (from B1WS\WsldServicesGenerator\wsdlFiles to B1WS\B1WS\WebReferences where the beginning B1WS is the directory where is installed the service).
Regards,
Eric