BUT i got thie error message when trying to install photopost pro
==== Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, firstname.lastname@example.org and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
Apache/1.3.41 Server at www.kongsigambar.com Port 80
one more thing, do i have to change the values in the config-inc.php if i want to install the program? Or like the user manual said, it all will be done in installation process?