how do I get to the asylum and do bansheep and Weseen work
If you bought paid version you can just go to job board and select Asylum map.
After that randomly ghosts are spawning as you know.
You can use "WHATAREYOU" cheat to learn which ghost is chasing you.
After that until "Bansheep" and "Wessen" spawns, you can just try to find them.
And then you can catch them.