TeamBG Hex Editing F.A.Q. and Tutorial

Hex Editing F.A.Q.

F.A.Q.
Introduction
Greetings to all welcome to FAQ Page.
These pages were brought to you by Thalic, GMAN, Graf, Seroki, and Suryiel. Thank them!
AND don't forget to thank Ken and TeamBG for these editors
They don't get paid for this!
Remember it is not a sin nor a bad thing to read the references at the top of the Struct List. A lot of Questions can be answered quickly there.
Now lets start

Q: I want to Hex Edit but I'm a Newbie, Help!
A:
1. You will want to join the mailing list (preferred method) or download the Struct List from Dh'arlo'me's Keep under files and review the references at the top of it.
2. Get a hex editing tool (A.X.E. is a good one)
3. Familiarize yourself with all of these materials
4. Use biffstripper to extract SW1H01.ITM and rename file to tutorial.itm .
for info on how to do this go to TeamBG Utilities FAQ
5. Start walk through

What is Hexadecimal Editing
(Familiarization)

ITM file structure

Adding a Struct
Walk through #1

Adding an Extended Header
Walk through #2

Misc.

TeamBG Home Page

TeamBG Utilities
Message Board

Hex Editing Message Board

What is Hexadecimal Editing
(Familiarization) back to top

Click here for all of the Knowledge in the world.

ITM file structureback to top

Values taken from
SW1H01.ITM

00000000	49	54	4D	20	56	31	20	20	F6	19	00	00	51	1A	00	00
00000010	4D	49	53	43	35	36	00	00	2C	00	00	00	14	00	80	D7
00000020	4C	40	53	31	00	00	0B	00	00	00	00	00	00	00	00	00
00000030	00	00	00	00	19	00	00	00	01	00	49	53	57	31	48	30
00000040	31	00	00	00	47	53	57	31	48	30	31	00	0A	00	00	00
00000050	52	1A	00	00	FF	FF	FF	FF	43	53	57	31	48	30	31	00
00000060	00	00	00	00	72	00	00	00	01	00	AA	00	00	00	00	00
00000070	03	00

This is a Header. A Header is 72h (114d) bytes long and contains general information like weight, price, text references and much more.

00000000	01	01	49	53	57	31	48	30	31	00	01	00	01	00
00000010	00	08	00	00	04	00	02	00	00	00	03	00	00	00
00000020	03	00	02	00	03	00	00	00	01	00	32	00	32	00
00000030	00	00	00	00	00	00

This is an ExtHeader. An ExtHeader contains information like damage (if it's a weapon), range, graphical effects and such a stuff.

00000000	07	02	05	00	15	00	00	02
00000010	00	64	00	A4	14	24	04	00
00000020	00	00	00	00	00	00	00	00

This is a FeatureBlock, simply called a struct. Structs are used to define what a special item does.

For detalied information on each offset go here

Made by Graf Hohfels

Adding a Struct
Walk through #1 back to top

Tutorial

We want to make a new item, it will be a bastard sword +2, +4d4 cold damage.
The first thing to do is to open an existing bastard sword with an Hex Editor.
You'll get them from using BiffstripperL.exe. NOTE: Make sure you saved the item
under different name, for example tutorial.itm.

Here we go:

Tutorial made by Graf Hohfels

Adding an Extended Header
Walk through #2 back to top

Tutorial#2

Now we will try to make some more difficult changes: we want to create
Bastard Sword +2, 4d4 cold damage unless save vs. spell with the
special ability to cast an ice ball (range: 50m, 4d4+4 cold damage unless
save vs. wand (then 2d4+2). Whenever this ability is used, the wielder
suffers 1d6+1 cold damage. But now it's a mighty weapon, so we will have to build
in a penalty: constitution and strength are decreased by 1 while the
weapon is equipped. And not enough, we're going to change the icons.

Here we go:

Tutorial made by Graf Hohfels

Misc. -

Q: Can i change the experience for my creatures?
A: Yes, It's not too dificult to discover such values:
(1) CLUAConsole:CreateCreature("DOOMGU")
(2) KILL IT
(3) write down the XP gained (2000)
(4) convert it to Hex (D007)
(5) open DOOMGU.CRE with a HexEditor
(6) find the value (D007)
(7) you'll get offset 0x014 (length 4 bytes)
(8) change the value D0 07 00 00 to A0 86 01 00
(9) save this modified creature into your override
(A) CLUAConsole:CreateCreature("DOOMGU")
(B) Kill it
(C) Feel experienced (100000XP)For the sake of experience,der Graf