Why do you need 2 or more soundcards?
Just set your PC to output all audio trough your current M-audio soundcard, and set Reason (or any other DAW) to your M-audio soundcard as well.
Note, this is an image grabbed from the web,. but the idea is the same.
You should see your M-audio soundcard there, rightclick on it and select that card in playback AND recording tab.