Given that the configuration is complex, how do I edit the file once the proxy has created it?
Well, one way is to use notepad…but who wants to edit large XML files using notepad? The way I would suggest is to use the configEditor application that is distributed with webtester. The configEditor.sh (linux) and configEditor.bat (windows) files will start the configuration editor with the sample configuration file distributed with webtester. The command-line used by these files can be modified to include your configuration file if necessary. You should read the tutorial before using webtester, if you have not already done so.