Me32K - Need to change the mail subject line, attachment name

Hi,

can u please throw light on the below three points which needs to be achieved.

1. Subject line of the mail needs to be modified from standard to "PO# XXXXXXXXXX".

2. Attachment name should be updated from stanadrd to "PO_XXXXXXXXXX".

3. Also by default mail will be delivered to the default id, but it should be delivered to multiple mail ids maintained in the vendor master.

I should achieve the above by user exits or by Zprogram copying from th standard.

Please advise me.

Thanks a lot.

Regards,

Kiran