Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
The 12“ 1.33GHz has the same USB based trackpad as PowerBook 5.6–5.9.

Prefs–>touchpad–>gesture–>click

Actual names may vary bit, my system is set to German.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.