Hi,
Is your solution using DEVICE = 'MAIL' when calling OPEN_FORM? If yes, please read through OSS Note 311037 - Printing using e-mail. You should be able to define up to 10 lines, as a static cover page for printouts sent via mail (I have not verified if this works). If that doesn't suffice, you are out of luck, I'm afraid. You'd be better off sorting out the otf to pdf conversion problem.
Edit in: alternatively, you could of course try to extend FM SO_OBJECT_SEND via implicit enhancement... All you really need to do there is to populate the table NOTE_TEXT, which will then get converted into e-mail body 
Create a singleton to hold text, set text in in the driver program before open_form, get it in the implicit enhancement at the beginning of SO_OBJECT_SEND, and, if note_text is empty, take over your text and clear the singleton instance...
cheers
Janis
Message was edited by: Jānis B