It does not correct. Daylight Saving Update includes recent Timezone at the time. It looks like someone applies SP1, SP2, SP3, SP4, SP5 and SP6a ordinary on Windows NT 4. (Of course we apply only SP6a on NT4.) You does not need old version DST, and should apply KB2904266 registry cause of the 2007 DST update is too old. You may use old timezone.exe.