I have a similar problem - I am trying to surgically manipulate one file in a .docx file, which is in reality a ZIP file produced by MS Word. Specifically, this file is word\comments.xml, which contains comments and author information. The ,docx may be large (my example is 815K), thus no desire to extract the entire archive (onto a slow network). Lastly, everything is done using automation and the Windows Shell through VBA. Extracting this file is no problem. "C:\Program Files\7-Zip\7z.exe" e -y...