So if i understand you correctly.....if I play the C Ionian scale from D to D i will in fact be playing the Dorian mode in D. So rather than starting at a different root in the same scale, the correct way is to find the corresponding Ionian scale by counting down from the mode number (in this case Dorian is the second mode so D=2) counting down one step takes me to C so i play the C major scale but start on the D note.
So the only difference in the D minor scale and the Dorian mode in the key of D, is that you play a B instead of a Bb as in a normal Dminor scale. Right?
I'll try your exercise when i get home...kind of hard to visualize how one note can make much of a difference in the overall feel...

Im really not attempting to become a theory whiz, just looking to break out of my monotonous/predictable patterns :)