Haha, Obrigado @Over !
Well, the best way i found to convert mangá, has the Mangle software (
http://foosoft.net/mangle/) because, converts to a folder with .gif images in sequence and i can read in fullscreen on kindle.
Maybe has a good idea to add this feature, to convert comics in a folder with images, is easy..
and the calibre is much better for make a workflow with many conversions to do... =D
And... i can use on my mac, without need to login on windows (
)