>> in index.php, i have not changed the relative path script. was i supposed to?
Hi. No, you do not need to change the $relative_script_path variable, unless of course you changed the directory structure of PhpDig.
Is it that "we are here2" printed out but "we are here3" did not? If so, do you get a grey popup box asking for a username and pasword when you try to access admin/index.php? If not, then set define('PHPDIG_ADM_AUTH','1'); to define('PHPDIG_ADM_AUTH','0'); in the config.php file and protect the admin directory with htaccess or another method instead.
Also, check out
this thread for a $_SERVER variables discussion.