#1 Go to navicat/SQLyog.
#2 Find "Creature_names"
#3 Find a blank spot.
#4 Make the creatues info. Here's an example.
Entry CreatureName Subname Flags1 Type Family Rank unk4
999999 SuperBananas Ruler Of Gorillas 0 1 0 0 0
spelldataID DisplayID Unk2 Unk3 Civilian Leader
Null 21362 1 1 0 Null
Now your creature is a creature!
#5 Go to Creature_Proto
#6 Enter in your creatures EntryID
#7 Enter in your Creatues Level
#8 Enter in your Creatures Faction (I think you can leave it at 0 for no faction)
#8 Enter its health and mana
#9 Enter its scale (what size it will be ingame)
#10 Enter its NPC flags (set at 0)
#11 Enter its attack time (they're meassured in millaseconds)
#12 Enter its min damage
#13 Enter its max Damage
#14 Enter its Rangemindamage
#14 Enter its Rangemaxdamage
#15 Enter its mount display (if you dont want it to have one leave at 0)
#16 Enter its item info (you can leave at 0)
#17 Enter its respawn time (millaseconds again)
#18 Enter its resistances
#19 Enter its combat reach (I'd leave at 1)
#20 Enter its bounding radius (once again leave at 1)
#21 Enter its auras (leave as it is either null or memo)
#22 Enter if its a boss or not I believe 1 is boss 0 means its not =)
#23 Go ingame and enjoy!
I'm still learning so this might not all be right correct me if I'm wrong!