modify/disable specialization bonuses to skills
-> i mean, if you chose "combat" as your specialization, you get +5 to each combat skill.
i would like to get rid of that or modify this into a fortify effect.
If you're working on some sort of leveling mod, take a look at Galsiah's Character Development. It does a lot of what you want through scripting but it's very editable and even has a well commented customize script. You might be able to use it as a model or even adapt it to be very close to what you are thinking of.
yes, i looked at galsiah's mod. i don't like it, that's why i wanna create something new

thanks, anyway