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  1. #1
    just 'round the corner PoptartHunter's Avatar
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    Default [TUT] How to Mod A MW3 Wii Gamesave + Fix The Checksum!

    In this tutorial I will be showing you how to mod the common.dat file in your Wii Call of Duty gamesave. Big thanks to Nity for teaching me how to do this correctly. All credits for figuring out the checksum goes to Nity also, I just made the tutorial.

    With game save modding you can do things like non host god mode, non host noclip, etc.

    First of all, you're going to want to download these programs:
    Savegame Extractor - http://wiibrew.org/wiki/Savegame_Manager
    HxD - http://mh-nexus.de/en/downloads.php?product=HxD
    Notepad++ - http://notepad-plus-plus.org/download/v6.1.2.html

    First, go into Savegame Extractor on your Wii and extract your Call of Duty savegame somewhere onto your SD card.

    Insert your SD card into your computer and find the extracted gamesaves. The folder containing the gamesave should look something like this:



    Next, open that up and it should look like this:


    0 = your first profile
    1 = your second profile
    2 = your third profile
    3 = your fourth profile

    Go into whichever profile you want to mod (0-3). I'll be using profile 3. Make sure to save a backup of the profile in case you mess up modding it.

    This is what it should look like inside the file:


    In this tutorial, we'll by modding the "common" file. So, open up HxD, and drag the common file into it.

    Once you do that, HxD should look like this:


    Notice, the 6th and 7th bytes represent the size of the gamesave.


    See:


    The first 4 bytes is the crc32 checksum of the file. To get this, just copy everything from the first byte down to here:


    ^highlight the file down to the circled 0's.

    Copy that, then go to file -> New and then right click and hit "Paste insert"

    It should then look like this:


    After doing that, you'll want to change the first 8 digits to 0, so it looks like this:


    Highlight everything from the beginning of the file to the very end of it. It will look like this:


    With all of that still highlighted, click the "Anaylsis button" then go into "checksums" then select CRC32 and hit "OK"

    This is the generated checksum we get:


    Look familiar?


    This is how you fix the checksum in the file, now here's how you mod it:

    Firstly, open up Notepad++

    Now drag and drop your common.dat file into it

    It should look like this:


    To add a dvar, simple use the "set" command.

    So, say we wanted to add the dvar "r_ColorMap" and we wanted the value to be 2 (Chrome vision).

    We would add a line in there that says, set r_ColorMap "2", then we'd save the file, open it up in HxD, then fix the checksum.

    But, say you wanted r_ColorMap to bet set to 2 when you press a button. You'd use the "bind" command., like this.

    bind WII_2 "set r_ColorMap 2"

    With that statement, when you press 2 on the WiiMote, it would set the dvar "r_ColorMap" to 2.

    But what if you wanted to make it toggle? Easy, use the "toggle" command"

    Bind WII_2 "toggle r_ColorMap 1 2 3"

    What this will do is, it will toggle between the values 1, 2, and 3 each time the 2 button is pressed on the Wiimote.

    To learn more commands and vstr, go to this site: CFGmodding.com

    Note: You must fix the checksum and file size after modding a file, or the mods will not work.

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    Last edited by PoptartHunter; 05-27-2012 at 06:08 PM.

  2. #2
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    awesome

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  3. #3
    Wii Coder
    ChumLee's Avatar

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    Fantastic job.

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  4. #4
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    Great job.

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  5. #5
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    thanks

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    Last edited by lucky1zclan; 05-26-2012 at 04:38 PM.

  6. #6
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    Lucky your a moron

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  7. #7
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    Quote Originally Posted by GOOBER View Post
    Lucky your a moron
    how all i said waz thanks

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  8. #8
    Member Justin's Avatar
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    Sexy Pop.. Just.. Sexy..

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  9. #9
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    shuld make a vid becuz u skip steps and i dont wanna mess it my profile

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  10. #10
    just 'round the corner PoptartHunter's Avatar
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    Thanks guys, I hope the tut wasn't too hard to follow. It's one of my first. If you have any questions feel free to ask!

    @Lucky1z, I'll try to make a video for it soon if I can.

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