At the tab "Connection" of the Project properties dialog you can define connection and authentication parameters for BackStreet Browser to use during the download process.
Use the parameter "Identification" to specify if during the download BackStreet Browser should identify itself as BackStreet Browser, MS IE, Netscape or Opera.
If you are using a proxy, turn on the option "Use proxy server" and set the necessary parameters. You can also specify account and password for HTTP authentication.