Things You'll Need
Instructions
Download Warkeys, and install both programs by double-clicking the file.
Load Warkeys, select the "Run" option and choose "Inventory Remapper," which will load AutoWarkeys.
Click on the tab corresponding to the inventory slots you want to change hot keys for.
Type in the key that you want to correspond to the inventory slot and any modifier keys you wish to use for it, such as "shift", "ctrl" or "alt". Do this for each remaining inventory slot.
Click "Save and Run Script" to set your new hot keys in game.