The Centova Cast logos are just PNG files in the /usr/local/centovacast/web/theme/images/ directory on your Centova Cast web interface server.
To change the logo displayed in the client/reseller/admin area, replace logo.png with your own logo. (You can use logobar-bg.png in the same directory as a background image if you want to retain the existing header background.)
To change the logo displayed on the login page, replace login-logo.png (in the same directory) with your own logo.
