Does anyone have ideas how to easily win the races?
THey are just like in Need for Speed. No matter what you do and how good you are, THE SCRIPTED enemies are always overtake you and win the race and the end of it.
Is there a cheat/trainer that STOPS them from moving?
Seconded, they're the only missions in the game that **** me off. Even with the driver skills, they seem to rubberband a lot. Haven't tried this yet, but have you tried ramming and/or wrecking their carriages?