If you have multiple classes and/or prestige classes, what happens to the lists of class skills you have? Do they exist seperately and you use them when you take a level of that skill, or are they all tossed onto one great heap as if you were a gestalt character?
Example: You are a Wizard 5/Rainbow Servant 4. You have just gained another level of Rainbow Servant, and want to put a skill point into Knowledge (Religion) because you want to qualify for the Contemplative prestige class later down the line. For a Wizard this is a class skill, but for the Rainbow Servant it is not. Can you take the extra point as if you were a Wizard, or is it a cross-class skill because it is not a class skill for the Rainbow Servant?
And to avoid some confusion, I do understand that your max ranks equate your character's total level + 3.