Can you use a different key ability for a skill check when it would make more sense for the situation? I think that I've read of this being done. I know there are feats and other abilities that let you substitute key abilities (to do stuff like intimidate your opponent by break-dancing), but is it possible to use a different key ability score for a skill based on circumstances alone?
For example, I've become more and more enamoured with CatLord's idea of changing the Hide skill's key ability score for pre-setting Hide. It doesn't make much sense that it should be keyed off Dexterity when Hide is used to prepare your hiding place before going to sleep – here, Intelligence would make much more sense. I'm contemplating a house-rule for this but I want to support it with precedents.