preset1 and teaser1 are used in the node and teaser displays, the other presets aren't displayed.
You'll be able to define the area cropped by imagecache for each preset.
If you have any problem or bug, you can report here
You can download module on drupal.org here
EPSA Crop version used on this site : epsacrop-6.x-1.2
Looking for a Drupal 7 demonstration : check it out here
this is a test for crop module