I am slipstreaming (or trying to) cpf into my windows install cd. Is it possible for it to do an unattended install?
This would be a nice addition to your installer if not, taking the reg code from setup.ini file or something… 
You could always export a registry file and have regedit import it silently with the /s switch.
The thing is that Comodo installs system drivers for its protection which can become a problem when it comes to unattended installs.
You probably should request this in the wishlist. 