ok, untill now i havnt the time to mess around with it but i found some today and i had some problems. I do all the little do wiffles and it generates my terrain i export it blah blah blah, but when i load it up ingame its just the flat terrain :/. I think i might no the problem but you seem to know a little bit more then me so ill let you tell me before i mess something up xD
It sounds like you're using the demo mx.exe. It can only read the tracks it's bundled with - anything else will come out flat. Use the mx.exe from the editing page.