What parts do you need help with?

Do you already have a document that you want to use for the mailmerge? You should have, since that's far easier to work with and maintain than trying to do everything in code. Then, instead of using 'Set wddoc = wdapp.Documents.Add' you would use 'Set wddoc = wdapp.Documents.Open("C:\MyDocuments\Document.docx ")', where "C:\MyDocuments\Document.docx" is the full name & path to the document.

As for item c, surely you can add .Execute to the code...

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]