Email Body when sending PO

Hi,

I know this question has been asked a lot and I went through most of the whole answers but it did not work out for me. I want to mail the PO as PDF,which is happening, but I need a body for the mail. The mail subject is working out fine. The settings are done in NACE in the mail header and texts. I came a note in one of the sdn post which says for external sending option email body is not allowed. What can be a work around? If the mail is being send then do I need to check if the partner function is being maintained(I really dont know if this has something to do with my problem)

I am working on a SAP-script and both the form and the form routine is a Z one.

Thanks

Amit