Dynamic FPS change during playthrough?

[Jebarkas]

I can change FPS in game options but would it be difficult to make a mod that automatically changes FPS during the playthrough (without having to go to options)? So that when I'm in combat FPS drop to 30 and once combat ends, it goes back to 60. Alternatively, FPS can be controlled with a hotkey, if it makes it easier.

The reason is that 60 FPS are perfect for character walking speed, but some fights can get a bit too frenzy and chaotic on 60 FPS, even with pausing and unpausing every few seconds.

[Sanderson]

Tweaks has a component to increase walking speed outside combat. I personally have never used it though. 

[Jebarkas]

Yeah, I went with that component in the end. It's a bit quirky, but it gets the job done - especially since Lossless Scaling only works when BG runs at 30 FPS, so I had to resign from altering FPS anyway.