Write LiveUSB changes to USB

[danharibo]

I'm wondering if it's possible to write changes to a LiveUSB stick. As you probably already know ubuntu gets mounted to a ramdisk to improve performance and save your USB stick's life (I think so anyway, don't quote me on that).
I'm wondering if it's possible to write any changes made, such as changing running services and installed packages back to the USB stick without actually installing ubuntu fully onto the USB stick.

Thanks, Dan

[Yvan300]

I always wanted to do this as well. I guess it should be easy seeing that the option is available in puppy linux. Anyone got any ideas?