I have tried multiple times, and get the same errors as bthoven, are you on a mac, or pc some of these commands are a little different on my mac.
i use ./ before all commands
when you say that you assume that the openvpn folders are in the current directory I assume that it is ok that I unzip to the android/tools/ folder which I have to be in to run ADB???
By the way I love how dedicated users make this effort