Tazusb is a tool that can create bootable usb media with a few simple commands. It can also compress and backup the entire current filesystem to the media, thus preserving all modifications for future use. Type tazusb usage for a full list of commands or read the TazUSB manual.

To generate your own LiveUSB media, first you need to login as root with su and locate your usb storage device using the command:

# fdisk -l     # normally /dev/sda1 

Then format and label your device (Warning: this will erase all data, make sure you specify the right device):

 # tazusb format /dev/sda1 

And finally generate LiveUSB media device:

 # tazusb gen-liveusb /dev/sda1 

And that's all you need to do, you can now boot SliTaz from usb media (providing your computer bios supports this method).

When you finish your LiveUSB session, make sure you maintain your installed packages, system settings, etc, by backing up the entire current filesystem with:

 # tazusb writefs gzip 

OR

 # tazusb writefs lzma 

This effectively compresses and writes everything to 'rootfs.gz' to be loaded the next time you boot.

If anything should go wrong when writing your filesystem, you can simply rollback to your previous filesystem by typing 'previous' at the 'boot:' prompt. Older backups are named 'rootfs.gz.unixtimestamp' and can be safely deleted from the /home folder to save disk space.

The official Tazusb manual can be found in SliTaz Web site documentation. which contains a lot more useful information. The manual is also available through the documentation menu on the LiveCD.

The maintainer of Tazusb has also written a nice article about the utility.