Printing of PO messages

Question:
We use ZME9E to print PO messages. I have seen that it would be better to use report RSNAST00 to to that. My problem is that when I do a reprint (the messages are alredy printed with ZME9E) I get a lot of messages, but I want exactly the messages printed by ZME9E.
I have used the settings APPLICATION EL and MESSAGETYPE LPET. Maybe thats wrong. I only want the changed messages from the last MRP run.
Can any body help me?
Best regards
Answer:
ZME9E is obviously a custom transaction. Looks like you're on your own mate.

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