So far so good, except that if our consciousness is only an emergent property of the swarm of simple algorithms that evolution and personal experience have given each of us, *any* change in the population of that swarm should also change consciousness. Perhaps the change will be minute, but isn't it more likely that in uploading we miss key pieces that affect the whole, unless, for instance, we put the entire mind into an exact replica of the body it inhabited prior to copying? And if so, have we not obviated the need for uploading in the first place? What's the point of putting the mind of a dying human into the body of another human that's dying in exactly the same way?
Perhaps there's a solution to this if, instead, we put the mind into a simulator, where it perceives itself to have the same body. Then, with the miracle of software, we "cure" the virtual body's cancer, say. Indeed, extending this logic, we could enhance anything about this virtual organism step by step until its virtual physical form corresponded perfectly to the actual physical form into which it will be downloaded later. But the conundrum remains: by changing its form we change its mind, and we have no idea which particular changes will change consciousness so much as to destroy the organisation of the erstwhile mind.
Remembering that these are just copies and not people, we could experiment endlessly until we found which particular changes worked and which didn't. Even so, I suspect that the complex nature of mind (and in particular, body-mind) means we will have to go through this process every single time we upload someone -- that we won't find many shortcuts. The problem is reducing the instruction set: matters we consider trivial from a top-down perspective, such as the mechanisms of moving the legs, may be so tied in with the concept of self in a particular individual (in ways even the individual doesn't comprehend) that altering them may alter the organisation of that individual's mind beyond the point of stability.
(On the other hand, my starting point in this extrapolation is a book that's five years old by now. Perhaps, if the theory has moved past this problem by now, someone on this list can illuminate me as to my error.)