ok, cool, I thought that when you took a level in another class, you would have to spend 2 points of skills to increase 1 rank in a skill that is not a class skill of the class you are taking a level in... that was not pretty clear...
Let's say a Rogue takes a Fighter level, and he wants to increase its Stealth (already has 1 rank in it and the +3), he only has to sprend 1 skill point to increase Stealth by 1 rank even if it is not a Class skill for Fighters?
Why was I under that impression? Is it an old rule that was left out in the Pathfinder system and I never noticed?
Anyway, thanks guys, you made one of my players happy!!! ^^