Nope, never could figure it out, altho a fix was promised long ago it hasn't happened yet;
http://forums.auran.com/trainz/showthread.php?t=60086
http://www.trainsim.com/vbts/showthread.php?296517-What-s-new
Christmas rush and post season support, along with that screenshot simulator (which thinks it's a train simulator) screwing up the Raildriver response with their "new technology" last September (last I heard nothing is working right in that) is probably keeping them busy, but I'll start haranguing them next month. Meantime I just change the config for whatever steamer I want to drive to use that C-41 engine spec, if the physics are off at least the Raildriver works, gotta have my Raildriver.
"I like the idea of the feeling of response from it, you can see where the levers are"
After the first couple weeks you don't even need to take your eyes off the screen, like the HOTAS for fighter planes you can find everything by feel. I customized mine with a razor saw, 1/4-20 machinists die to cut threads, and a couple of file handles from the hardware store so it feels more like a first generation diesel road switcher controller;
Need virtual reality goggles with head tracking and surround sound and I'll be all set.