Problemas OsCommerce (cambiar permisos)

[Vehcla]

Buenas tardes,

he instalado perfectamente el kit de OsCommerce y lo he instalado sin problema, sin embargo, no logro entender dónde hay que cambiar los permisos de los archivos.

El manual indica:

"Reset the permissions on /catalog/includes/configure.php to 644 (if you are still getting
the warning message at the top set configure.php to 444 which is read only - this happens
on some servers that have been updated for security reasons).
Set the permissions on /catalog/images directory to 777.
Reset the permissions on /catalog/admin/includes/configure.php to 644.
Create the dir /catalog/admin/backups and set the permissions to 777.
Set the permissions on /catalog/admin/images/graphs directory to 777.
You need to .htaccess your /catalog/admin directory so that it is password protected. You
can use the password manager in your server admin area like cpanel."

Me podéis explicar qué debo hacer? Ya que cualquiera puede acceder al panel de control o dichos archivos.

Un saludo y muchisimas gracias,