I don't think there is an option to disable the warnings. Please consider that main kernel drivers (AV and/or firewall) will be loaded even if you disable the features in ZA. It is simply not designed to be run in half baked form (i.e. only AV, only firewall, only on demand, etc...). Please also note that the wide availability of webinstaller is to avoid users to install it in offline mode. ZA may not install correctly if offline. Connection is needed to configure properly various ZA components including, but not limited, the network setup and application control). The webinstaller will also take care of installing the right files for your OS and the language pack if on other languages. The full installer is gigantic and many user complained about it. Sorry.