It doesn't matter what our target is, even or odd you just need to correctly guess the last 2 hex characters and then you can use the script I posted above to divide your key by 1024, but first you'd need to subtract n/4 from the result on 1024 - index.
Try it yourself and you will see, even if we guess the last 2 chars incorrectly, there is a way to again calculate p/1024 no matter what.  God willing I should be able to figure that out, it's complicated I know but once it's solved you realize how easy it was.