The only reason I made the suggestion is you stated that someone hacked your site. If you have a backup you could do the same thing. But if the backup is corrupted you would not gain anything.
If you were to overwrite your files then you would need to preserve the config.inc.php file in the includes folder.
But you probably would be better off opening a support ticket and have Rick take a look at it if you don't feel comfortable overwriting your files.
Rick will need a admin logon for the board and a ftp account to check the files and possibly access to the mysql database.
