Thank you Retrowave, didn't know that. I will give it a look.
But the shortucts is only part of it. Maybe I am wrong again, here are 2 points that I find really annoying:

• If I want to crop the top and botton of an image into the the middle. I have to create a layer, with say the bottom, and move that layer on to the middle..In the end merge layers (and so move my mouse out of the image to the layer palette). It is so simple in PSP in comparision: select, move, done !.
  
• The Stroke select pops up a dialog. I have to click it to close it. In PSP these are optionnal docked options you don't have to bother if you don't change any setting from the previous time. Activate the stroke selection button and highlight any part of the image: done !
  These 2 tools I use quite frequently.
  So when processing snapshots it took so much time compared to PSP I gave up.
  But I didn't uninstall GIMP. It has a great tools, so I still think I can do something with it..

Yarp - author of P3DO Organizer for Poser