How do I change NV time zone?

[LauraAmerica]

Hi all.

I live in -06:00 GMT (Central Time) but when visited my cousin (Pacific Time) found a great deal for a Vogue at a Sprint Store and got it. My problem is that if I configure the Touch to get the time from the carrier it gets Pacific Time (since that's the time zone where I got it) even if I have changed/corrected the time zone in the Regional Settings.

My solution has been to get the time from network, then manually change the time (one hour less) and disable the auto-get time thing.

I would like to get it done automatically but seems like that won't be adjusted by a ROM upgrade or any flash since it is in the NV memory.

Is there any key I can adjust in the REG to get this done (automatically, as should)?

Thanks.