OpenXPKI Live can be used with a persistant storage device, such as a USB flash drive, to create a persistent CA. You will need a storage device that can be mounted with this CD (most USB flash drives will be mounted automatically) with 100 MB of free storage. The filesystem on the drive is not important as an ext2 image will be created on it.
In order to create a new CA on your drive, open a terminal, enter sudo su to become root, mount your drive and run /usr/sbin/openxpki_live_persist.sh with the mountpoint as the only option. OpenXPKI will be redeployed and you will be asked a few questions about the CA certificate that is to be created. Once all is done (this may take a while, please be patient), you can start working with the configuration and database on the drive.
If during boot, a drive with an OpenXPKI Live image is found on the system, the system automatically uses the drive for the configuration and database. So you can carry around your CA on a CD and a USB thumbdrive! If the drive containing the image is not automounted during boot, you can manually mount it and then execute /usr/sbin/openxpki_live_boot.sh (as root) to achieve the same effect.