Responses
No one has done the full translation for Volume 4. This site has translated up to chapter 9 of Volume 4 http://lily-ros3.livejournal.com/. So you'll just have to be patient until all the chapters have been translated. Otherwise, you can read summaries of the chapters of Volume 4 here http://xfengyujiutian.tumblr.com/tagged/volume%204
Please link me to the full vol 4