Pankso's openbox treat is very close to WICD, but if you want to set up SliTaz for not very experienced users it's recommended that you use WICD for Wireless Internet Control.
Do as root:
# tazpkg get-install wicd # leafpad /etc/rcS.conf
In /etc/rcS.conf remove from the section RUN_SCRIPTS: network.sh and add to the section RUN_DAEMONS: wicd
Then as user:
$ leafpad .config/openbox/autostart.sh
And add to the end:
# wicd Network Configuration wicd-client &
Then remove the network-plugin from the LX-Panel by right clicking on the network-plugin.
Reboot - don't test before rebooting, because network.sh is interfering with WICD (even if you stop it by typing /etc/int.d/network.sh stop).