First, you must have hex editor program, then open any file in npc folder.
For example \zoneserver\zonedata\npc\1
npc 1 = Memora
00000000:b1 f6 c0 71 a9 d4 00 00 00 00 00 00 00 00 00 00 ฑ๖ภqฉิ..........
00000010:00 00 00 00 01 00 14 00 31 36 1e 40 11 00 00 00 ........16.@....
00000020:16 00 04 00 11 00 00 00 15 00 05 00 00 00 00 00 ................
00000030:00 00 00 00 b8 0b b8 0b 20 03 00 00 03 f0 00 00 ....ธ.ธ. ....๐..
00000040:c8 00 00 00 00 00 00 00 00 00 00 00 19 ศ............
0000 - 0013 = Monster's Name - b1 f6 c0 71 a9 d4 is Memora's name in chinese, you can change it to 4d 65 6d 6f 72 61 (Memora) so Monster's name in quest window will change to Memora on English too.
0014 - 0015 = Monster's index
0016 - 0017 = Respawn rate (in second)
0018 = Attack Type (first digit) and Race of Monster (second digit)
Attack Type: 2 -passive, 3 - active
Race 0 = Human
1 = Beast
2 = Half
3 = Demon
4 = Spirit
5 = Mutant
0019 = Target Selection (first) and Vision of Monster (second)
Selection: 2 - weakest player, 3 - active player
Vision = 0 to 15 cells
001a - 001b = DEF of Monster ex: Memora = 1e 40 (i don't know about 4) so its DEF = 01e/2 (in hex) or 15 (in dec)
001c - 0023 = Range, Area and ATK power of First Action
11 00 00 00 16 00 04 00 means -
ATK Range (Max) = 1, ATK Range (Min) = 0, ATK Area = 0, ATK Power = 22 - 26 (4)
0024 - 002a = Range, Area and ATK power of Second Action
11 00 00 00 15 00 05 00 means -
ATK Range (Max) = 1, ATK Range (Min) = 0, ATK Area = 0, ATK Power = 21 - 26 (5)
002b - 0033 = Range, Area and ATK power of Third Action
0034 - 0037 = ATK Speed
b8 0b b8 0b = 3000 - 3000 millisecond (3 second) for next attack , 500 - 500 (0.5 - 0.5 sec) for Kynen, Raneias 100 - 500 (0.1 - 0.5 sec for each attack)
0038 - 0039 = Moving speed
20 03 = 800 (0.8 sec for 1 cell), 100 for Kynen (10 cells in 1 second!), Raneias = 0.5 sec per each cell
REMIND THAT YOU CAN'T CHANGE MOVING SPEED BECAUSE BOTH IN CLIENT AND SERVER MUST BE MATCH.
003c = Level
003d - 003e = Player EXP, f0 00 = 240 (20x) because exact value of Memora's EXP is 12, Maximum Value = 65000 (e8 fd)
003f = Skin (first) and Size (second)
For Skin; 0 = Soft, 1 = Hard Shell
For Size; 0 = Small, 2 = Medium, 4 = Large, 6 = Giant
Memora has soft skin and small size, Kynen is Hard and Giant.
0040 - 0043 = HP, c8 = 200 (Memora's max HP)
0044 - 0045 = Ice Elemental Attack and Defence
0046 - 0047 = Fire Elemental Attack and Defence
0048 - 0049 = Light Elemental Attack and Defence
004c - 004d = Mercenary EXP
Enjoy it!