Follow this setup example to configure PPTP VPN connection on your D-link Boxee Box device so can stream US content.
Boxee Box PPTP Settings
SafeVPN allow users PPTP connection without encryption. We recommend use this solution for Boxee Box.
You don’t need extra security for streaming and this will be much faster for you.
Go to Settings -> Network -> VPN
Connection Type: PPTP Server: your server IP address, you can check correct details in Customer Area Account: Your Username Password: Your Password Encryption required: Disabled (Unchecked).
However you can configure VPN as PPTP with encryption. This way you need use correct server IP for encryption connection(can check correct one in Customer Area) and enable encryption on Boxee setting