I'm wondering if anybody can tell me the formula the Quest for Glory games use for skill checks and growth.

I mean, if I tell my hero to climb a tree. How does it determine if he succeeds, and what determines if/when/how much his Agility or Climbing skills increase?

Ah, I thought the bumper sticker was obtained at the Saurus Repair Shop. Thanks for the clarification.

Just a confirmation, in order to get the bumper sticker, you have to have opened the box instead of displaying it in your room?

Is there anything else you can do in the Saurus Repair Shop? I found it on my own, but I can't talk to the guy or anything (Well, I can screw with the lift)