Some day I'll add it but for now the best way to position hotspots is to select the hotspot tool and use the arrow keys to move the image about. Then hold 'shift' to switch frames. The hotspot stays in the middle of the screen.
If your ripping sprites from a sprite sheet and the person who made the sprite sheet didn't align the graphics to any type of grid then sadly you have a bit of work to do, but using the arrow keys and the shift key its really comfortable and you quickly get the results your after!