I haven't been able to re-create that error here using my 0.6.0 binaires and db. But, "Unknown type/pettype of: 0,0. Using Default Formula..." may be at least a partial cause. It looks like whatever pet you are creating isn't in the db. Have you tried creating pets that are found in it? The mob crash could very well be the pet itself, and not a NPC. That could also explain the pain and suffering crap when using a pet.
So, first thing try to create a pet that is in the db.
Also, try out my db included with the installer here:
http://eqemulator.net/forums/showthr...4&page=1&pp=15
Maybe it's a bug with PEQ's pets.