Is there a Ubuntu variant that comes with flash pre-installed? I used to use Lubuntu, as chromium used to have it, but now it doesn't work. The reason I want it pre-installed is that I use it a lot as a live CD. Thanks
There is a way to make changes persist that are made in a live session. It relies on a mechanism that searches all drives for a filesystem with the label "casper-rw". It will mount that filesystem as a writeable overlay over the non-persistant filesystem (this is called a union mount).
There are multiple ways on how to go about this. If you want to continue booting from a CD, then you can plug in a USB stick (before booting the live session, not after -- it must be present while the live session is booting).
Or you could make the USB stick contain two partitions, one with the bootable live system and a second partition with the "casper-rw" filesystem.
The details can be found here (read them in this order, the first article seems more to the point):