For BFD3 (but not NI sadly) the Cubase function to automatically obtain the Drum Map from the Instrument works great. Personally I created my own internal map inside BFD3 because I prefer putting items in an order that makes more sense to me (took about a half hour) than the BFD3 default. But whatever internal map BFD3 is using, Cubase is able to generate a map from it.
The lack of maps for NI drums generally keeps me from using them. Also about 90% of the time I program drums inside BFD3 because their ability to paint in different rolls, diddles, etc. is pretty useful.