No Inventory During Combat

Prepare Or Die.

Disables the inventory menu during combat. So you can only use what you already equipped and slotted before in preparation for a contract/boss fight.

Install:

Same as installing most other TW3 mods. Avoid Vortex; TW3 Mod Manager is recommended if you need a manager. Place any \modxxx folders directly inside your <TW3 game install>\Mods (or \mods) folder, and place any \dlcxxx folders directly inside your <TW3 game install>\dlc (or \DLC) folder. Merge everything with Script Merger.

How to install the most simple TW3 mods for newbies/klutzes:

First, you need to find your The Witcher 3 game installation location. Usually it's somewhere like "C:\GOG Games\The Witcher 3 Wild Hunt GOTY" for Good Old Games versions of the game or "C:\Program Files (x86)\Steam\steamapps\common\The Witcher 3" for Steam versions of the game.

Script Merger

Download and install it, then run the installed program to make sure it's working.

Optional but highly recommended:

Mod Manager Redux

Download and install it, then run the installed program to make sure it's working. Installing it all to somewhere like C:\TW3Modding\ should work.

Mod Limit Fix (FOR CLASSIC 1. 32)

Download and install it, then run the installed program to make sure it's working.

Enable the Debug Console: https://www.nexusmods.com/witcher3/mods/3375. Press the keys on your keyboard until you figure out which one activates the console.

Thereafter, you can install most mods by downloading them manually (VORTEX IS NOT RECOMMENDED WITH TW3 MODS; IT WILL EVENTUALLY CAUSE PROBLEMS). Extract the contents of the downloaded mod file (right-click on it and select 'Extract') and then place the files and folders in the correct locations in your game install yourself, or let TW3 Mod Manager extract and place them correctly for you (recommended).

If you're not using TW3 Mod Manager, you need to make sure all of your mod's \modxxx folders end up directly inside your <TW3 game install>\Mods folder (or <TW3 game install>\mods, wherever your other mods are). If there's no mods folder in your TW3 game install folder (TW3MM would have created one for you), you can create one by right-clicking on some space there -> "New" -> "Folder" and naming it "Mods". That means your \modxxx folders end up as <TW3 game install>\Mods\modxxx. TW3MM would place it there automatically for you so you wouldn't have to.

If your mod has \dlcxxx folders, they similarly need to be directly inside your <TW3 game install>\dlc folder (or <TW3 game install>\DLC wherever your other dlcs are). They should be placed as <TW3 game install>\dlc\dlcxxx (never <TW3 game install>\dlc\dlc\dlcxxx!). TW3MM would do the task automatically for you.

Your mod's mod menu file xxx.xml would have to end up as <TW3 game install>\bin\config\r4game\user_config_matrix\pc\xxx.xml. Again, TW3MM would do the conversion automatically for you. If you happen to have more mod menus than what can fit on the mod menu list, you can easily edit & group mod menus together into subgroups yourself using something like Notepad++, for example: 1-> 2 (that mod menu was placed in a "combat" subgroup, example from Menu Strings).

If your mod has custom keybinds, you probably have to add them to your <My Documents>\The Witcher 3\input.settings file using some editor like Notepad++. Once more, TW3MM will usually do the merging automatically for you.

After your mod's files & folders are in the right places, you need to run Script Merger and merge any conflicting files that can be merged together (that means both .ws scripts and .xml bundled files).

Sadly, not all mods will automatically merge together; most probably won't (though all LEGO merge automatically with each other, obviously), but some unresolved conflicts can be solved with a little manual help: