I've been doing tests on that aswell, and heres what I have so far. Be warned this is still only a theory but so far it seems to be looking correct
Code:
61 blocks
Each block consists of four bytes example "00 00 00 00"
All must be entered using hex.
1st block: ItemID
2nd - 5th block: ItemName
6th Block: (Profession) 00 (Required Level) 00 "Profession will be Mage = 0A Warrior = 14 Palidan = 1E "Required level will be the hex version of the level IE level 25 = 19"
7th Block: Unknown Yet
8th Block: Unknown Yet
9th Block: Monopoly In Hex, Example 12 = 0C
10th Block: Price
11th Block: Action Id
12th Block: (attack Max) 00 (Attack Min) 00 "All in hex"
13th Block: Defense
14th Block: Dodge (Dodge) 00 00 00
15th Block: Amount in the form of "00 00 (amount)"
16th Block: Amount max in the form of (amount) 00 00"
17th Block: Unknown Yet
18th Block: Magic Defense
19th Block: Attack Speed 00 00 (Attack Speed)
20th Block: Hit Rate (Hit Rate) 00 00 00
21st Block: Target All tests were "14 00 00 00"
22nd Block: Cost In EP 00 (Emoney) 00 00
23rd Block: Official1 00 Official2 00
24th Block: Official3 00 Official4 00
25th Block: Official5 00 Official6 00
26th Block: Official7 00 Official8 00
27th Block: Official9 00 Official10 00
28th Block: Official11 00 00 00
29th Block: Soul (Soul) 00 00
30th - 61st Blocks: Description of Item