Incearca sa exporti din Firebird in text / csv si apoi sa folosesti "flat file source" in "import export wizard". La o "survolare" rapida a documentatiei de pe http://www.firebirdsql.org/pdfmanual/Firebird-2.0-QuickStart.pdf nu m-am lamurit daca Firebird ofera "tools" de import / export de date, dar am gasit pe Google utilitare "third party", de exemplu:

http://www.sqlmanager.net/products/ibfb/dataexport

Vezi si  un "tool" de migrare firebird - sql aici:

http://www.spectralcore.com/fullconvert/adwlanding.php?source=fb2sql&kw=Firebird%20to%20sql&gclid=CKeWhZa0y44CFQM8ZwodOhTvCA