There is no condition in which the Lions can win the division if they lose another game. Even if both the Packers and Bears lose next week.
Loss = Elimination

Week 16
If both GB and CHI win (eliminated)
One team must lose. Doesn't matter which one.
If both teams lose, the Lions regain control of their own fate.

Week 17
If either team won in week 16, that winning team must lose the week 17 contest.
Otherwise (eliminated)

How can they win this game against the Midgets?

Midgets.

Ha!

I have no idea what happens if we tie

I still think they can do it.