Thanks Dimitry. Really it's an easy and quick solution, I will try.

--- In firebird-support@yahoogroups.com, Dimitry Sibiryakov <sd@...> wrote:
>
> > Does anyone know how to convert a database version 2 to old version 1.5?
>
> Create new database on 1.5, pump data using FBCopy or IBDataPump.
>
> SY, SD.
>