I can't find any leveling up scripts or whatever, so I think it's hardcoded. Nevertheless, you might be able to get away scripting a custom menu after leveling up that adds another perk. I can't find any good resources on perks and leveling up, unfortunately. You could try opening up other people's mods and seeing what they've done. One person had a mod where you could buy perks, so maybe if you changed it to buy perks with a token you get once whenever you level up, that could accomplish something similar. If you don't care about being a little messy, it's probably easier to just make Here & Now available on ever other level, and halve the number of skill points they get. :P Edit: Take a look at this thread: http://thenexusforums.com/index.php?showtopic=134394 If you can find a way to induce a perk menu, it should be pretty clear.