well for me its a step process
#1 trainz exe
#2 menu(sometimes starts the session sometimes not)
#3 computer freeze reboot
#4 cuss yell and go back to step #1 repeat 3 times then you can start and play/build
If I am going into CM2 then Windows XP ... trainz icon ... Trainz menu
If I am going into driver/surveyor then, Ubuntu, drill down to Trainz.exe on the Windows partition and launch via Wine