Time sync

[Gabriel Menini]

Hello, folk.

I have a dual boot system (MS-WindowsXP / Ubunutu GNU/Linux) and live in
the America/Montevideo Zone.

But my country entered in Day-Light-Saving a month ago. The Public NTP
Servers don't know anything about this local political matter, but mu
Ubuntu system when booting syncs with ntp.ubuntu.org or something like that.

Well, I don't want it to happen anymore, I just want Ubuntu to take
Hardware Time and set System Time to HW Time.

How can I disable it?
I tried disabling the ntp service using Webmin without success...

TIA
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