Postgre and XML

["x asasaxax" <xanaruto@xxxxxxxxx>]

Hi,

   I´m interested in running xml with postgre.
I use postgre version 8.2 and
windows xp. I would like to know how
can i enable the xml in the postgresql. 
    Did you know if its secure to use this xml function of
postgre in commercial applications? How much trustable its this module? Can anyone explain me how to install the xml module?

Thanks for the help.