That actually sounds like the best approach to me. I keep an old standard keyboard around with physical danish layout. And if I could keep the OS layout as danish as well, that would allow a co-worker to pair program with me, with her using a standard keyboard and me showing off on my model01 
Can you provide some more details on how to go about that?
Also to consider: If I change my layout to danish brackets go to the AltGr layer. How can I map them? (See also my other thread about a custom brackets key)