Disable horizontal scroll in my touchpad

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http://forums.opensuse.org – Hi everybody. I can't find a option for this, so i must ask. I hate the horizontal scroll in my Aspire ONE. Sometimes i move the whole page by mistake, and just loose myself in the context that i was reading. So, how can i disable the horizontal scroll of the touchpad ? I'm on openSUSE 11.2. Thanks in advance. :D (Distributions)