Is there a mechanism to skip directly into demo mode on the live CD?

I'm using [Ventory](https://ventoy.net) to boot with a persistent image and it works great. The need to set the keyboard, language, and explicitly enter demo mode on each boot is getting a bit irritating. The [bootconf_replace](https://www.ventoy.net/en/plugin_bootconf_replace.html) plugin allows me to replace the ISO's isolinux.cfg and inject kernel parameters. Are there any parameters I can set to bypass early configuration and go straight into demo mode?

Thanks in advance!