> Unfortunately, I don't know anything about Interbase 6.1. But when I
> moved an IB 6.0 application to Firebird 1.5, I only needed to do two
> changes:

> 1) Backup the database in Interbase and restore it in Firebird.

> 2) Update the setup program to install Firebird rather than Interbase.

Firebird 1.5 will not be developed further. So in the long run you'll
have to take the time and get it to Firebird 2.0/2.1/2.5.

Regards

Stefan