HI Soumya
I am not aware of the above tcode..... but you can try creating a custom WF and then give a WSxxxxxxxx in the "task" Fields and see if your workflow gets triggered. If it triggers, then it's an easy job for you as you can copy the standard task, use it in your WF and add multiple steps in the workflow to pass make custom data available to the copied task.
Regards,
Modak