INstallshield Express

Try as I may, I cannot do a partial BDE install when using Installshield
Express Custom version which was packaged with Delphi 4 Prof.
I am able to do a Full install, but then have to manually delete the 3
Datapump files.
Am I going nuts ??
Or can someone please throw some light on the subject.
The local Borland people just say. IT WORKS. Hah!