Changing Full Conversion settings in-game?

[Streetboat]

I had an idea that involved changing around the settings of various in-game effects in mid-game. For example, changing the brightness or radius of night-vision in mid-game upon running a script? I had an interesting idea involving items in the Diablo universe that could change certain effects for the player, and I would love it if this were possible. It seems like it would be really easy to change, considering the changes would just involve simple number changes (For example, in the darkness light radius, change the brightness from 0.2, 0.2, 0.2, 1.0 to 0.4, 0.4, 0.4, 1.0). No reload required for that, right? <.<

I hope I'm not just way too ambitious for my own sake!