I'm currently at an impass with a mod I'm working on. For it to work, I need to access and set various experience point levels for the different skills. I can get the skill level values for the player, but not the value of the xp used determine when the player gains a skill level. In other words, where is the storage of the value that determines the skill progess bar between levels?

These values are probably stored in global variables, but I can't find any good documentation on the matter.