If you have "physical" access via NT Explorer or through the NT Resource Kit, you can change the permissions of files and directories via the Properties option. If you do not have physical access and your hosting company has turned on permission edits via FTP, then you can use a variety of FTP programs to change permissions of files and directories. If your hosting company has this option turned off, then you need to contact your hosting company and ask them to change permissions for you!

Regards,

Eliot Lee