Is there a way to do a silent install of Firebird?
Run Firebird installer with one of these options:
/SILENT, /VERYSILENT, /SP-
Instructs Setup to be silent or very silent. When Setup is silent the wizard and the background window are not displayed, but the installation progress window is.
When a setup is very silent this installation progress window is not displayed. Everything else is normal, even startup prompt is displayed. If you wish to disable it, use /SP-
For more options and info, install Firebird and then read the installation_scripted.txt in 'doc' subdirectory of your installation. This instructions are actually taken from that file.