I have bought  Lionel Polar Express Set 2-8-4 Berkshire steam locomotive I have two questions.

1. Can I install a sound DCC decoder in side the Loco or tender?

2. And what Company is recommended?
The traindude.

Mr Bachmann I have Steam Locomotive that needs parts. Part # H11402 Diecast Chassis  Set. And Part # H11401 Baldwin Body Shell. But the Dicast Chassis Set needs to be together. I sure would appreciate that very much.  The belt broke.   What is the price of the parts?