If this is your first Fallout 4 mod, please Google how to set up
your game for mods. Otherwise this will not work.
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If this isn't your first Fallout 4 mod, simply extract or drag &
drop "EnhancedDRPerks.esp" into the following directory:

"(Drive Letter):\Steam\steamapps\common\Fallout 4\Data"

Once it's in there, add it to your plugins.txt and set the file
to "read-only" in the .txt file's property settings.
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PLEASE NOTE:
If you already have any of these damage resistance perks before you install this mod, you must take the following steps:
1. open the console and use "player.removeperk" to remove whatever ranks you have from the appropriate perks:
Toughness:
player.removeperk 65e5e (REMOVES RANK 5)
player.removeperk 65e5d (REMOVES RANK 4)
player.removeperk 4a0af (REMOVES RANK 3)
player.removeperk 4a0ae (REMOVES RANK 2)
player.removeperk 4a0ab (REMOVES RANK 1)
Refractor:
player.removeperk 65e4c
player.removeperk 65e4b
player.removeperk ca99f
player.removeperk ca99e
player.removeperk ca99d
Rad Resistant:
player.removeperk 1d247b
player.removeperk 1d247a
player.removeperk 1d2479
2. Re-add the ranks you had of those perks
(The same commands as above, but instead of player.removeperk it's player.addperk, instead of going down the list however go back up until you get your proper rank back)