I created a custom install with 3 features.
A is always install
B is a new feature set to "Visible" and "Install by default"
C is a new feature set to "Visible" and "don't Install by default"

If in run the install normally, and just press NEXT then FINISH, then
A and B are installed.
If however I run the install with /S (silent mode) then only A is
installed.

Custom features have the option "Install by Default".
I believe that if this is checked, then the feature should also be
installed when running in SILENT mode.

I tried setting SB FEATURESID to my default set, but that didn't work
either. I can simulate the desired behaviour by removing the customer
features part, and replacing with checkboxes, but this is not ideal.

Regards,
Alan Telford
Development Manager
Maxtel Software Ltd
http://www.maxtelsoftware.com