FYI- It is impossible to place the rings anywhere except exactly where they were!!! ( without damaging something on assembly)
The ring grooves on the piston have 'pins' to keep them exactly in the same place as before they were removed. all you have to do is remember which ring was on top and which one was on the bottom. Also it is very important to keep the rings right side up so that the ring gap meets the pin perfectly like this ------ \*/ . Just imagine the asterik as the pin in the top of the ring groove.
Hope this helps!