There is a new version of d2x-w32 available, fixing problems with joystick usage introduced when fixing the speed bug. That version allows to set a dead zone for the joystick with the command line argument "-joydeadzone XX" where XX is the percentage of the maximum value range of the joystick data. E.g. "-joystick 20" means 20% dead zone. Default is 10%. Any value from 0 to 100 is possible (100 doesn't make much sense though, unless you prefer to play in "sitting duck" mode ). Use the command line or d2x.ini for the parameter.
Have fun.
I'm off for skiing now for four days. Keep on posting suggestions and stuff, but don't wonder when I don't reply right away.