I have no knowledge of how disability works, and you obviously are under no obligation to respond, but these are some of my thoughts after reading your post:

When DVR says you're in the "most extreme category," is this a good development or a bad one? Does this mean that they're willing to devote limited funds to vocationally rehabilitate you so that you can re-enter the workforce, that they're highly motivated to work with you (say, more than other candidates) to find a position in which you'll utilize a unique skill-set and possibly thrive? Why do you think they categorized you in this fashion? If they determine that they've found reasonable options for you (not necessarily what you find reasonable), and you decline these "opportunities," would they consider you uncooperative?

Setting aside your psychiatric diagnosis for the time being, would you qualify for disability on the basis of physical ailments alone? I mean, if you believe that no amount of re-training will make you safely employable, do you declare that up front?