Your advice worked great.  I did set the chassis to a type PXI-1042.
Slot 1, however, is a "PXI System (Unidentified)", and doesn't provide
the option to select PXI-8310 (my starfabric interface to laptop); when
I try to identify as other, I can't seem to find the appropriate INI
file to select.
Also, my DAQ PXI-6289 is listed under the NI-DAQmx Devices tree and is
not shown as slot 2 of the chassis.  I wonder if this is normal
when using the cardbus interface?
Anyway, I'm fairly confident that the setup will work as-is.  It's
on to setting up numerous matrix switch modules!  I've got a
project to  scan 195+ diff coupled inputs.  Yikes!
This is my first experience with PXI.  In the past I've used GPIB,
daqcards, AT and EISA cards, and even VXI.  I'm hoping I won't be
disappointed.  I decided to skip the whole SCXI thing.
Regards