Either that or link to a separate file containing just username and password with the 'password' option inside the openvpn/proxpn config file.

@reinob
The VPN is useful, if you have to hide your traffic from your ISP, that might block or throttle services like VoIP or torrent, which are lawful, but manhandled by the ISPs anyway.
The extraction of the win or mac installer is necessary for linux users to get the necessary config file for the VPN for that provider, because they do not care for linux users. Is that a surprise to you???