I have a question about the differences between WinLem and 'original' lemmings too:
In WinLem, an exploding lemming works like a blocker, i.e. he turns other lemmings around.
I found that out playing 'Five Alive' and thought it has to be in that way.
Now, playing original lemmings with dosbox, I see that an exploding lemming doesn't turn other lemmings around.
What is right, what was it supposed to be?