It puzzles me that the knuckle is in the palm and the finger is against the back of your other fingers, that sounds messy... is their anything still holding finger to your hand.... sounds like you need a bit more than just straightening and relocating of the finger ... sounds more like surgery was needed
Actually you can get an idea of what my finger looked like by laying your little pinky over the back of your other fingers. Notice that the middle knuckle points up? Now just roll that knuckle down until its against your palm. You may have to break the bone between the two knuckles at about 60 degrees to make it though.............