can you explain how you make the live iso?

im running ubuntu 20.04.1 lts daily build amd64 desktop.
i only use “Try Ubuntu” and then i use these commands.
first i enable the community drivers in settings
then i do these commands in a terminal
sudo apt update
sudo add-apt-repository -y ppa:myriadrf/drivers
sudo apt-get install python3-pip python3-pyqt5 python3-numpy python3-scipy python3-soapysdr soapysdr-module-lms7 gqrx-sdr cubicsdr limesuite
pip3 install --user qspectrumanalyzer

this gives me qspectrumanalyzer, gqrx-sdr, limesuite and cubicsdr.

what it does not give me is a working nvidia binary driver so i can use opencl fft or cuda like for fosphor.
anyhow if you could share your knowledge on how to create custom ubuntu 20.04 live enviroment “Try Ubuntu” with a working nvidia binary driver instead of the nauveau driver it would be awesome.