All you need to do is double click OpenVPNPortable.exe to start.

You have first create a .ovpn file and ssl-keys to ./data/config directory. 
A HowTo is found on http://openvpn.net/howto.html

If you want to connect on program startup, disable the splash or some 
settings else, copy the ./other/OpenVPNPortableSource/OpenVPNPortable.ini
to ./ and edit it to change the behaviour of OpenVPNPortable.

Hope this works for you as needed.

Let me know how you go or any problems to gulb@users.sourceforge.net

Lukas Landis