Installation:
- copy KoboRoot.tgz from the archive to the .kobo folder of your device
- eject the device
- select "handle update" > "install update"
Alternatively, copy the content contained in KoboRoot.tar to the appropriate locations on the device.
Usage:
Select "scripts" > "date time" > "select time zone by region" to change the time zone.
If you change frequently between a limited number of time zones, edit the script select_time_zone_by_custom_list.sh according to your needs, and select
"scripts" > "date time" > "select time zone by custom list"
(If you edit a script, reboot the device to make sure the script file is read from the sd rather than from the cache.)