Custom Timezone without DST

Hey guys
I’m having a few problems with the new TimeZone feature of Rails 2.1.
Turns
out that I am on “Brasilia” TimeZone, (UTC - 03:00), BUT my state is NOT
on
the daylight saving time. And there is no other timezone for my country
with
this offset from UTC (-3:00) and that does not use DST. So, I would like
to
do one of these two things:

  1. Create a custom time zone

OR

  1. Change “Brasilia” TimeZone to, on this specific app, not use the DST.

Is any of these options possible? Is there any other solution for the
matter
(like :use_dst => false, or something like that?)

Thanks,
Dante R.