The Question Immemorial: How do you import Heretic/Hexen monsters into Doom?

[THMG]

So, I'm working on a project that would greatly benefit from the Heretic/Hexen monsters, and am wondering: How does one go about importing them into Doom? Is it as simple as copying them from the Heretic IWAD into a resource .wad and setting their DoomEdNums? Or would I have to find their definitions, translate them into decorate, and then do this for each and every monster? Or, preferably, is there a resource pack that includes all of the Heretic/Hexen monsters already ready for use in Doom?

[Empyre]

Their DECORATE definitions should be inside zdoom.pk3 (or the equivalent for the port you are using). They can also be found in the ZDoom wiki:

Heretic Monsters

Hexen Monsters

[Kappes Buur]

You have to go through each actor's DECORATE and search for subsequent actors, sprites and sounds.

Something like where I inserted Hexen's LAVAPOT in a DOOM2 map , or something like this