Sender email id in Mail STEP of workflow

Hello Friends,

I have few issues in worklfow, Can someone please help me out.

1. Update email notifications for all workflows so that this is set to be sent from the Generic email address defined.

        Currently in all SEND MAILstep,  WF-batch email will be consider as a sender email id  but we would like to use

        different email id  instead of wf-batch email(as we do not want to change the email from WF-BATCH in SU01).

        what is the best way to achieve this.

        Note : We have around 6 worklfow and more than 20 MAIL STEPS so we do not want to change all the

         MIAL STEPS with FM SO_NEW_DOCUMENT_ATT_SEND_API1

Many Thanks

Best Regards

Trupthi