maybe you could morph out of the finger the area you want to lay it, then load the morphed and unmorphed objs in a spreadsheet.  subtract one from the other and it'll get you which verts were affected.  then get the original coordinates of the verts.  you'd still have issues, though, like where the center of the ring is from where the coordinates eminate and how to compare that to your morph data
that would be more trouble to me though...i just place items using the dials and typing in minute amounts 'till it works out

go that way really fast.
if something gets in your way
turn