A scripted event is anything in the game that is controlled by a script. This can be quests, spells, anything. They are much more versatile, as they can include other scripted effects or hardcoded effects. A hardcoded effect would be something like Fire Damage. It has some set parameters like the ways it can be cast, the default damage, and stuff like that. Some things can be modified, but it will always look and perform the same way, more or less.
For the other questions:
1. I'm not quite sure what you mean here, as most of the magic effects in Skyrim are hard coded, just like Oblivion. They have a certain effect or effects that you cannot change without changing every spell that relies on it.
2. Several spells would not be able to transfer from Oblivion easily, as there is no base effect for them in Skyrim. You could always add the spell effects, but some might not work at all and others might rely on scripts.
For the other questions:
1. I'm not quite sure what you mean here, as most of the magic effects in Skyrim are hard coded, just like Oblivion. They have a certain effect or effects that you cannot change without changing every spell that relies on it.
2. Several spells would not be able to transfer from Oblivion easily, as there is no base effect for them in Skyrim. You could always add the spell effects, but some might not work at all and others might rely on scripts.
I'm still having trouble seeing the issue. Someone said Oblivion's magic/spells were hard coded and then drew the distinction that Skyrim's magic/spells was scripted based. I don't get why Skyrim can't have Spellmaking if both Oblivion's and Skyrim's magic/spells are a mix of hard code and scripting.
All I know is that 1] I'm very unhappy without spellmaking, 2] my first mage svcked and switched to melee/stealth... so I've already hit all 3 styles in the first go around, and 3] I have no desire to start a 2nd character under the current state of things and after just 3 months Skyrim has no replay value and has been shelved where Oblivion had me for years across multiple platforms.
It irks me to no end to think this is what I was looking forward to for three years and when I think about how I'm probably going to be stuck for another ~5 years waiting to have a chance at an Elder Scrolls game made by a Bethesda team who learned from Skyrim that, "yes, Spellmaking is actually a big deal to a large enough portion of players".... I want to stick a few pins in a Todd Howard voodoo doll.
As far as I'm concerned, Bethesda should port Oblivion's magic system complete with spellmaking and offer it as a free mod to substitute the current magic system.