So I've installed WANem and the only way to download it is by downloading a WANem custom version of Knoppix OS with WANem already installed. I want to add a start up script to configure something every time I start this OS, but since there's no option for me to install the OS and I have to run it from USB every time, I see no way to do this.Is there a way for me to add a start up script to a bootable USB? 
Debian: Add start up script to bootable USB
debian;scripting;startup