Found it!
https://forums.comodo.com/empty-t54008.0.html
"Now that Comodo has released a .msi version of the installer, customised silent installs have become feasible.
Following is a list of known properties and their possible values (? indicates the value is unconfirmed). There is no need to include a property if using the default value.
INSTALLANTIVIRUS=
0 don’t install anti-virus
1 ? install anti-virus (default)
INSTALLFIREWALL=
0 ? don’t install firewall
1 ? install firewall (default)
FWFEATURES=
1 firewall only, no defence+
2 ? firewall & optimal defence+ (default)
3 ?? firewall & maximum defence+ (wild guess)
THREATCASTFEATURE=
1 ? join threatcast (default)
2 don’t join threatcast
SETOURDNSSERVER=
0 ? don’t use Comodo DNS servers (default)
1 ? use Comodo DNS servers
INSTALLDEFHOMEPAGE=
0 don’t change IE homepage
1 ? change IE homepage (default)
INSTALLASKDEFSEARCH=
0 don’t install IE toolbar
1 ? install IE toolbar (default)
For example the following command will install the firewall only (x64 version with no AV, D+, TC, DNS or bonus features):
msiexec /I PathToInstaller\cis_setup_x64.msi INSTALLANTIVIRUS=0 FWFEATURES=1 THREATCASTFEATURE=2 INSTALLDEFHOMEPAGE=0 INSTALLASKDEFSEARCH=0 /Passive /NoRestart
while the following command should install everything (x86 version with AV, FW, max D+, TC, DNS and all bonus features):
msiexec /I PathToInstaller\cis_setup_x86.msi FWFEATURES=3 SETOURDNSSERVER=1 /Passive /NoRestart"