> gbak -B localhost:MyDB c:\temp\emptydb.fbk -m -user sysdba
> -password masterke
>
> gbak -R c:\temp\emptydb.fbk c:\temp\emptydb.fdb -user sysdba
> -password masterke

If you're wanting to create a new database from a backup, you use the -C
command
-C = Create Database
-R = Replace Database

Nig.