Can I 'include' a .PHP from a totally seperate location/server/domain?

For instance, can I call w3tnews.php from a totally different server/domain?

Because w3tnews.php needs to talk to the database and it get's this information from the config.inc.php file, you would need to copy several files over to get this working. It's possible, but would take some tweaking of w3tnews.php and config.inc.php. You would probably also need main.inc.php and mysql.inc.php