Download DorHUD (the hook used by this mod):
https://steamcommunity.com/groups/dahm4pd

Extraxt dahm-public-release.rar into your PAYDAY: The Heist folder:
C:\Program Files (x86)\Steam\steamapps\common\PAYDAY The Heist

If you already have DorHUD just extract the .rar file of the mod into your PAYDAY: The Heist folder:
C:\Program Files (x86)\Steam\steamapps\common\PAYDAY The Heist