Hi. For question one, you don't need a robots.txt file to use PhpDig, but if you want a robots.txt file, a tutorial can be found
here. For question two, basically chmod is a *nix command. To check file permissions on Win machine perhaps try using the file manager. However, if you were having permission problems, then you would probably see a "Can't open directory: Permission denied" error. For question three, the output looks like that you posted, except there are no warning messages. For question four, I don't think so.