Alright, apparently this series is like a Junkion. It's not hard to knock 'em out, it's getting them to stay done that's the trick.
So special thanks to @CoachMac for showing me how to finally get the last two teams included in the Playoff selections in the original EA and NHL Hockey [92]. This means that now you can play as the United States or Yugoslavia in playoff mode.
So here we go again.
[also updated the original post]
IIHF Hockey (91) F2.bin IIHF Hockey 92 F2.bin