如果我不是管理员，如何下载phpBB3论坛的所有帖子？

I am used to post my ideas on one forum and started to worry that I will loose them if it gets closed. Do you know a good way to download entire (ideas of other guys are also nice!) phpBB3 forum to a database? Is there software already available, or I have to write it myself?I am used to post my ideas on one forum and sta