Ok, thanks for your reply.
I will try with Image Forge and tell you about the future of this mode : if i can do somethning that will no more make me puke at firt sight
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For all the people who want to have a close look at the Rackham's universe, the site is also in english (and in german and italian i think) : just click the little flag in the top left of the page and voila !
See you soon (and don't hesitate if someone want to lend me hand).