Not sure if this issue was delt with but you should take note that calibrating your monitor may not be all you need, printer calibration may also be necessary. but... Who want perfection anyway?
Also, you can do a simple calibration from your system preferences menu, under the displays section there is a button in the color tab. Its not the best calibration, but better than none.
You may also want to look into getting an external monitor, as the calibration units are a lot cheaper then the ones for the powerbook. If I remember correctly, the powerbook needs a certain calibrator which is much more pricey than the rest.