howto set static ip address @ bootup?

[m_g_m@gmx.net]

Hi, 
i have a network-connection to a friend and want to be my ip-address at
eh0 automatically set @ bootup. how do i do that? (address is 192.168.0.2 and
i usually do just ifconfig up eht0 192.168.0.2 but it's not the best way to
enter this command all the time, so i need to find out in what init-script i
should add it)
thanx,
Michael

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