Importing Penumbra stuff into Amnesia

[The Rock Worm]

If one were to add items and monsters from the Penumbra Series to Amnesia, who would one do it?

I have played both and love both. My #1 favorite monster in the Frictional Games series is the Grey Rock Worm from the Penumbra games. According to its .ent file, it has 40,000,000 health and does 300 bite damage! I love to see it chase around the Amnesia monsters and battle them.

I have heard that some have already added stuff from Penumbra to make interesting stories in Amnesia. I wish to do the same, but don't know all of the steps.