> Thank you, but both options are not appropriate. We are not allowed to
> touch existing firebird installations on customer pc's, so we can't
> use them.

"Touch FB installation" and "use FB installation" are two different
things. Tell me, please, exactly what you cannot do?

SY, SD.

PS: If I were you, I would write down in system requirements "Firebird
server version X.X or above" and let customer's sysadmin do his/her job.