If i've got you right ( simplified )the only thing you have to do, is to analyze what tones there are in the cord and then use a scale that fit these tones. I'm i right?
You said if you want a jazzy sound on a m7 cord use dorian. Is this the scale most guitarist use on a m7 cord if they want to play without using the pentatonic scale? If this is correct what other cords are often used on the other scales?
Later, Kim
P.S
Do you have tabs of other scales? If, can you mail them to me on this adress. Kimnybakken@c2i.net