trackpad tapping on ibook

[sopu]

Hi!
Can anybody tell me how to enable trackpad tapping on my ibook G4?
Hope you can help me ...

[callipeo]

You can switch the trackpad mode hitting alt+[Brightness up] and alt+[Brightness down]. You can also change the "TPMode" value in /etc/pbbuttonsd.conf, either manually or using powerprefs.