Rene,
I have only admiration for what you are doing. I have use of all my fingers and I can tell you I have wished for the same voice switches sometimes myself. Finding your way around a JR TX can be frustrating! I would follow Matt's lead and go for the product he mentioned. I would suggest you contact a local electronics/software guru than could assist you. My own thoughts around this is to have a speech act menu with a voice feedback confirmation of commands, at least until you can trust a bunch of electronics to have some control over your Jet.
Good luck
Andre Baird