NHF – new heroes for Heroes V 3.1.

No way. EE is based on scripting functions 3.0, while NHF is 3.1.

Maybe someday EE will be released with full support for 3.1.

Understood, thank you)
P.S.: They went into alpha (version 3.2) in December 2014, and half of their links don't work, so we probably won't be waiting for them to support 3.1.