Adventure
 

Has anyone used the authoring kit for White Wolf's Adventure?

I suspect that's much too obscure for it to have gotten any love, honestly.

What about the old world of darkness the system is very similar

I don't find any evidence that anyone has done work for oWOD for HL; honestly, the gist I've seen is that even nWOD isn't that well supported (certainly there's no sign of much of anything past Changeling added to it).

I guess my next question is how hard it is to set something like that up

There are two approaches you could take; starting with World of Darkness as a base and using the Editor to replace the WoD material with Adventure! material, or starting with the Authoring Kit files and building up Adventure from scratch. Either one is going to be a major, long-term project.

In particular, its not going to help that oWOD and nWOD use slightly different attribute sets, in ways where they aren't just renamed substitutes.