Should make it pretty easy to put a custom OpenVPN configuration in the VPNCenter package
This is a work in progress for DSM 6.2.4
profile reset save Deletes all authentication and connection details from the config file in your userprofile.
profile reset host .. port .. user .. pass save Saves your authentication and connection details in your userprofile.
The last argument to the .exe is the location of the workfolder.