[kmodel99]

Good morning, I drive a BMW E63 650i. I also have the problem of active steering.

How do I know which zusb is without active steering, and which I have to flash?

DSCAxx -> Active Steering
DSCxx -> without Active Steering

By the way, it's trial and error solution. We aren't 100% sure which one to choose. But I did some of cars with this fault nd haven't any problems. But there is 1-2 people in this thread who brick DSC ECU.

In my opinion:
1) You need to choose proper DSC file -> if your ECU is DSCA60, then choose DSC60. 
2) When choosing for example DSC60, you will have few ZUSB numbers. Choose the most similar ZUSB to the original.

After programming, it will propably stuck on 100% or 99%. Just let leave it for few minutes (5-10 min) and then close WinKFP. Then you need to clear errors and do some initializations/adaptations.