shame on me... i forgot it... thank you Red!
so i used it, first i included it in my xml file, i "double clicked" to put a lensflare in my 1st pano, then i clicked on "back" button, then a new pb appeared: each time it crash after clicking on "xml" button... the only solution i have is to reload the html page (the lensflare i installed is not saved)... do you have an idea why?
i precise that i have the last version of krpano and editor plugin... my xml file is quite long (about 5500 lines)