Hi. I'm trying to figure out the best method to make a mod that would guarantee a certain multiplier across all attributes (excluding luck, now and for the remainder of this thread). As far as I can tell, I'd need to edit the GMSTs as in http://planetelderscrolls.gamespy.com/View.php?view=mods.detail&id=7429, then apply a global script that would 1) increase a skill in each attribute category by one point before the player goes to sleep, then 2) decrease each of those skills back down by one point after the level-up menu. The trouble is, I'm not sure how the timing works in an "if ( GetPCSleep )" block, so I'm not sure if my proposed method would get the job done anyway.

I'd normally just edit and test when I have a question like this in my head, but there doesn't seem to be any way to modify the player character's skills from the console in a way that affects his attributes/level. This was discouraging enough that I figured I'd just ask first.

I am not an expert but I am not sure you need any script at all. As you quoted Linora's Levelig Mod, I think you need only to tweak the following GMSTs:

iLevelUp01Mult = X
iLevelUp02Mult = X
iLevelUp03Mult = X
iLevelUp05Mult = X
iLevelUp06Mult = X
iLevelUp07Mult = X
iLevelUp08Mult = X
iLevelUp09Mult = X
iLevelUp10Mult = X

They mean "With a number of 1 or 2 or 3 etc skills that increase my level-up, the governing attributes get an X multiplier"

Right, but there's no "iLevelUp00Mult", which means that, no matter how I tweak those settings, at least one skill-up will still be required to get the multiplier for the governing attribute of that skill.

That's how it works. With proper balancing it is quite good, imho. Although a leveling system such as the one of Vampire: The Masquerade - Bloodlines is better, imho.
I do not know... how about GCD? Maybe it could be useful to you (I do not use it so I do not know).

These two seem to guarantee a 5x multiplier, not sure if looking at how they did things would give you some ideas:
http://www.tesnexus.com/downloads/file.php?id=13384
http://www.tesnexus.com/downloads/file.php?id=29859

They just seem to change the levelup multiplier so you still have to get 1 skill point to get 5.

Apologies, failed at reading comprehension there.

I'm not looking for a leveling mod, I'm looking for a way to implement this behavior as a component of a leveling mod I'm (feebly) working on. Sorry for being unclear.