Just a quick update; after the ABC asked me to remove iviewfox I had a bit of a think about an alternative and I stumbled upon
xVideoServiceThief. It supports rtmpe and works on windows, OSX and linux.
Unfortuanately at the moment it doesn't support passing extra rtmp parameters. I have
posted in the xVST forums and have received a response from the developer that this feature will be available in the next release.
It should also be possible to create a plugin for plus7 I think.