We use Client2 SP3 on Win7 x64 PCs, and our silent installation is
working as expected with the following exception:

NICI is always installed, even though "InstallNMAS=No" and
"InstallNICI=No" are set in install.ini.

If I remove the NICI directory from the installation source, NICI
doesn't install, but at the conclusion of the client install I get an
error dialog and no auto reboot. I can live with this, but ideally we
should be able to exclude NICI in a fully automated install.