no idea. I had a look at the link you posted and it seems unnecessarily complex to have to unpack a Windows exe (probably self-extracting zip) only to get to the openvpn config file. The settings should be clearly indicated without having to unpack anything.

Plus whoever wrote the blog you posted has no clue and mixes openvpn with PPTP.

The question is why you need a VPN. If it's for geolocation-avoidance you could just rent a cheap VPS (look in lowendbox) for that. If you need secrecy/anonimity then neither a VPS nor a paid service will help you. In fact, nothing will help you