Don't worry, I know how the splitter works
I know the splitter is working, I don't have any trouble with Map Monkey using the virtual port, and if I hook up a GPS monitoring program to the other port (the one I use for RR) it works fine.
I've read you can take the speed value straight out of MM to use in RR, what is the command. I've read it's something like "MM;CurrentSpeed".