As well as generating WSDL, 4s4c will also generate an HTML based service description, this is returned when a GET [e.g. http://localhost/ssss4c/soap.asp] is made on the SOAP listener [earlier versions of 4s4c returned a generic error page in this case].
The service description includes a RDDL resource entry that points to the WSDL, for those applications that are RDDL aware.
The service description is generated by doing an XSLT transform on the WSDL, the output is formatted using CSS. Both the XSLT [wsdl.xslt] and CSS [wsdl.css] are in the http\asp directory and can be modified to suite.