Here's some really great resources I've found to help with the server:
mqemulator.net/advsearch.php?type=npc - This site is great for all sorts of things including searching for NPCs, zones, drop lists, spells, items, etc.
wiki.project1999.org/Main_Page - This is the p99 wiki but I've found it very useful for things like finding out which zones are from which era, connecting zones, etc as well as all sorts of other great stuff.