I know HTML, but reading that was like trying to decipher hyroglyphics
I read and I think I understand what your saying .... you want the survey information, done by the user, to write to one file without overwriting other information, which you can view/be viewed by others? I have a few websites I visit occasionally for HTML, Im sure I can find you a script/solution. But from the looks of it, it will take ALOT of scripting.