PrEDoK
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Incorrect. NHF_E has significantly more heroes than that mod.
You are likely installing the NHF version, not NHF_E (extended).
How to install it – read in the attached descriptions, and you must remove the mod from all campaign heroes.
Yes, everything worked.
But there is a problem with the abilities of some heroes (I installed the patches). One of them is Valafar, who can create a portal through which Inferno heroes can pass, but instead, he simply has the "portal to town" spell.
Added after 3 hours and 42 minutes
Never mind, the abilities of the heroes don't work for anyone.