Originally Posted by pdurrant
Yes, you can unzip, edit and then zip again.
When zipping, the mimetype file must be the first file in the zip, and it must be zipped uncompressed. The other files must follow.
I wrote an Applescript for Mac OS X that does this zipping. I'm sure a batch file for Windows could be written too.
What I do is unzip the ePub, and then make the changes and put back just the files that I've changed. Works quite easily.