Maybe put Jan Koller in defence. Whenever the ball is near goal it's bound to hit the big lump. Then you could put Rosicky just behind Baros.
I had a round robin tournament with a mate who went as Czech Republic, strangely, for him it was completely the other way round. He couldn't score to save his life but had a pretty mean defence. His defence seemed to improve when he had Gliner partnering Ujfulusi at centre back. Have no idea regarding what other formations and strategies you could look at though.