From any linux system, insert the usb key and run this command

cd /path/to/usbkey/
bash download-binaries.sh

Insert key into master and run this command

cd /path/to/usbkey/
bash install-master.sh

To add a node to your cluster, insert the key and run this command

cd /path/to/usbkey/
bash install-node.sh

It will default to hitting master by DNS name, if you do not have DNS setup as such:

cd /path/to/usbkey/
bash install-node.sh 10.10.10.10

Where 10.10.10.10 is the actual IP of the master.