Upload MS Word-2010?

Hello,

My requirement is as follows,

1) MicroSoft word-2010 documents are available in the LAN, say, my_ms_word_doc

2) I need fetch this my_ms_word_doc and add/replace/change some text (at a fixed position in my_ms_word_doc), this text/value/data will be pulled from SAP data base

3) after the 2nd step, send (updated) my_ms_word_doc to outlook email inbox

or we can convert my_ms_word_doc into a PDF doc and send this converted PDF to outlook inbox.

Here, main point is UPDATing the fetched the my_ms_word_doc, because i knew 1st step(UPLOAD ATTACHMENT UI element), 3rd step (we have couple of FMs or classess for emailing), pls. let me know 2nd step

Pls. let me know How can i get achieved this requirement?

Thank you