How do I get Shadowhaven to work?
 

What do I have to do to make Shadowhaven work? Do I need to have a perl script that runs from cron to check for corpses over 1 day old?

Searching the forums/wiki doesn't seem to give any useful advice, at least not under the key "Shadowhaven".

Shadowrest, I believe you mean. I believe there's a rule value that you can toggle to either disable or enable the Shadowrest corpse retrieval system.