I don't think you can set the default value to '0' at the database level, either we need to write a iterative procedure that uses DBCC CHECKIDENT to scan through all the tables in the DB and reseeds the seed to '0' or has to be done by manually applying either in the scripts as mentioned by you (0,1) or has to be updated for every table in the management studio in the design mode.
Prasad Bhogadi
www.inforaise.com