Scripting: changing spell effects

[Letsplayforfun]

I've been around the vault a lot, but can't get a clear idea of how to change spell effects, so if someone here can help me out, that'd be nice.

I've in mind, if possible, not to use haks, overrides, .2das, or the like.

Anything i can script and inserted into module properties suits me best.

[TheMoonlightBecomesYou]

Open spells.2da and find the one you want. Go to the corresponding script from the script wizard. Change that spell.