I'm in central time, USA.
I downloaded the timezone.zip file. I moved US\Central to my USB key's config folder and renamed it to "timezone" (no extension). I then set the time zone to (custom) on the settings page and hit apply. Syncing with NTP is enabled and appears to be working, if that matters.
All times displayed (in unmenu, syslog, etc) are still displayed in UTC instead of CST. Am I doing something wrong? Thanks!