image re-projection blender 2.6+ gimp 2.6.11 problem

Hello! I try to use a technique (image re-projection) like in this video :
http://www.sintel.org/videos/image-re-projection/
I set first gimp in user preference/file…
But when I click on ¨¨quick edit¨¨ then apear : Error .Image path // (file name) not found,image may be packed or unsaved…and no gimp windiow opens… What error do I make?? thnks

Error .Image path // (file name) not found,image may be packed or unsaved…and no gimp windiow opens
Have you saved the image file before trying.

Ohh…which way? in uv editor /image/save as image??? yes, I did… and what about format and location??I save png in some folder where I have all my project.
In all ¨¨tutorials ¨¨ I can see , there is nothing about file saving,they just click a quick edit,and gimp, or ps window opens…

Ok,sorry, in this thread there was a similar issue:
http://www.blender.org/forum/viewtopic.php?p=81956&sid=469d82225bd95a4a96be8f2bafa3a2bd
anyway, Now ,I can do it,but not so easy…that means…no way to open automaticaly gimp window ,just when I click on ¨¨quick edit¨¨
I have to save an image,then in gimp to open it,and save…bla bla ,bla… But ,ok,after i do this,I can use apply button.
But I would be gratefull if you know ,what setup to fix 100/100 this problem