EDIT: FIXED :D You sould mention in the tutorial that the customization pack is not necessarly to be for the phone model you are flashing, the important thing is to be for the same platform and the same region as your FS.
For example on my k810 with the "Configuration error..." i tried some k810i customization packs but the error was still there but then i found another tutorial that mentioned what i say and i customized my k810i with a w660 customization pack and now it works fine. :)
p.s. sorry for my english, i'm romanian.