Correct. If you use a regular die you can either subtract 1 from every roll to make 1-6 into 0-5. Or you can treat rolls of 1-5 as 1-5 and a roll of 6 as a roll of 0. Whichever is more convenient for you.
If you really want to use standard dice as your piecepack dice one thing you can do is paint in the upper left pips on each of the die faces as a directional mark (doesn't quite work as a dm mark on the side with one pip). Then if you ignore the painted pip you get 0-5 and if you don't ignore the painted pip you get 1-6 (since some piecepack games go 1-6), and if there is a game that benefits from directional die faces (like Crazyhouse Chess) you will (mostly) have directional die faces.