I've just started Witcher 3 GOTY edition. I only bought this recently due to there now being a FOV mod that adds a FOV slider to the game. I previously purchased the base game on release but had to send it back for refund because there was no FOV slider.

I've installed the FOV mod from Nexus, following the instructions, although I appear to have more files downloaded than is noted in the instructions. I've tested the game but there's no FOV slider in Options.

Also, is there anyway to rebind F5 for quick save? This only seems to remain locked when all other locked key bindings are unlocked for some reason.

Ok, I've got to ask: why are you bringing this up here and not on the mod author's page? No. Certain keys remain locked. Though you could probably use a third party software like AutoHotkeys, or maybe even edit the input xml, but that would require knowing what you are doing.

Can you share the script change that works?

Yeah, sure. Sorry I've been off it for a couple of days.Tried to get the FOV slider to work again but managed to delete some important files and ended up having to reinstall the whole damn game.

This is the FOV mod I'm using: http://www.nexusmods.com/witcher3/mods/789/?

Just make a folder called mods inside the games main directory. Drop the modFOVWider folder in there. The game should initialise the script at launch.

If you want to change the FOV value edit the r4Player.ws file, the lines you want are:

DampFloatSpring( camera.fov, fovVel, 80.f, 1.0, timeDelta );
DampFloatSpring( camera.fov, fovVel, 70.f, 1.0, timeDelta );

The first value is for sprinting, the second value is walking around.