Attached Link: GSar from GnuWin32 project

Piece of cake. Go to the attached link, download and install GSar, which is a command line utility for Windows. Take the "Complete package except sources". It's a self-extracting installation file. Install it for example "C:gsar". Open command prompt (using "execute", "cmd.exe") and navigate to the install directory. Typing "gsar" gets you the condensed help how to use the program, but in essence it's really easy. An example "gsar" command: "gsar -o -sc:: -rx:: x:pz3dummy.pz3" The -s directly followed by a string is the search string. And the -r is the replace string. Semicolons must be escaped by another semicolon, hence the "::" instead of just ":". The above example changes the string "c:" to "x:" in the file "dummy.pz3". Gsar has one drawback: filenames can't have spaces on them. Just rename the pz3 or pz2 files if there are spaces in their names. Needless to say, take backups before proceeding until you're happy with the outcome.