I will add names in the future.
Unpack to ...\The Witcher 3\Mods
Oil Icons need tweak (the other way 4 icons look the same)
Tweak edit def_item_alchemy_oils.xml - I changed path only
Okay, I added Witcher 2 icons. Don't kill me guys, I'm not some sort of a photoshop master, if there is somebody that can edit 4-5 oil icons, send me a PM
Also, I added Icons in 60x60 size (as requested by sb in a comments), but that doesn't look like it changed anything.