That said, tooling around a nuclear Poland in a humvee is awesome. Of course that was written before we remembered what IEDs were.
No reason you couldn't put IEDs in your T2k game.
What I always find funny is how people agonise over the premise and background for a postapocalyptic game. The thing is: you don't need one. When the guys were fighting at Stalingrad, did they consider the particular details of how that came to be? How many people in present-day Afghanistan or Somalia would have an encyclopedic knowledge of the recent history of their countries?
"We're here in the shit. How do we get out of the shit?" The GM's job is to describe the shit, the precise details of the digestive process before the shit got dumped on the characters are not important.
"But how is that more nukes weren't fired off? And why isn't there a nuclear winter?" asks the annoying player.
"Interesting questions," replies the GM, "now how will your character Private Hillbilly from the 671st Infantry Regiment find out the answers to these questions? By the way, roll for wandering monsters - er, enemy patrols."