[Zope] call stored procedure from sql method object

I have installed ZOracleDA to bridge Zope and Oracle 8.0.5 on Linux. How do I call the stored procedures written in Oracle from "Add a SQL Method" interface, especially when there are OUT parameters returned from stored procedures? I have read the DCOracle mini how-to but there seems to be a missing step ahead. Assume the scenario: Oracle Procedure: myProc(para1 IN VARCHAR2, para2 OUT INTEGER, para3 OUT REFCURSOR%TYPE) What should I put in the "Arguments" box and "Query template" box? And how do I retrieve the returned arguments in the following dtml document/methods? Thanks a lot! Chien-pin