Hi Robert,
You'd have to experiment, but I'd always suggest making a backup or renaming the files first.
One trick I'll often do when I'm not sure is rename a file and add a prefix, e.g. reference.php becomes _DELETE_IN_MAY_reference.php and set that to a date a month or more out. Then if when I look at the site later there was no problems I know I can safely delete that file.
Dave Edis - Senior Developer
interactivetools.com