Native IB drivers installation: how?

Hi, I've developed a program in delphi 4.02 that acesses Interbase using
'native' drivers (BDE config.->Drivers->Native->Interbase). I've tried
to install this app into another computer using InstallShield Express,
but on the targhet machine I can find only a ODBC driver for Interbase
(Interbase 5 by Visigenic).
How can I install the native drivers on the targhet computer?
HELP!
(answer mew by e-mail too, please)
Thanks
Marco Menardi (mme...@sunrise.it)