I'm having another problem like that.
I'm doing the installation of cms "movable type" , working with CGI scripts and need permission CHMOD 777 the folder (/ public_html / fretsonfire) to run scripts and also be able to record data, but I am not able to do that.
When installing the cms always get the error message "The 'Publishing Path' Provided below is not writable by the web server. Change the ownership or permissions on this directory, then click 'Finish Install' again."
Would have any way to fix it?
Thanks