Note: This method may lead to corrupted save games at some point according to sources here at 360 haven.
I posted this in another forum and thought I would add it here since so many are having trouble. I'm far from pro, but I have been able to use this method to edit my saves. All of the information here was gathered from other threads and I'm only arranging it and did not discover any of this information.
You will need Hex Workshop and the awesome bookmarks from the Dark Souls modding discussion thread created by Turk645 and Magnus Hydra.
Bookmarks : http://www.360haven.com/forums/attac...9&d=1319013357
1. Getting the userdata file from your save.
A. Using Horizon, drag a copy of your save to a folder. Immediatley make a copy of this save and rename it DRAK005 - prehex or something incase you jack it up.
B. Drag the DRAK005 file back into Horizon and you should see the window that displays information about the save.
C. Click the Contents tab and select the user_data file from the top of the list. Right click and select export. Export a copy of this to the folder where you extracted the save from your USB.
2. Loading the bookmarks
A. Right click the user_data file and select open with hex workshop
B. In HW, click Tools > Bookmarks > open bookmark collection. Select the bookmarks you have downloaded and extracted.
C. You should now see the bookmarks loaded on your user_data file
3. Editing the stats
You can edit your stats using the bookmarks and a hex calculator (google for one if you dont have a favorite). If I just want to add souls or humanity or change a stat, I generally use the mod tool from Jappi for simplicity.
4. Replacing items
This is the part most people seem to be having trouble with.
A. First you need a quantity of an item to replace. Shortswords or chain helms from the first vendor work well.
B. You need the ID for the item you want to replace. This is available on the forum.
For this example I will use a shortsword (0000000000030D40) and replace it with titanite shards (40000000000003E8):
Search the user_data file for the item you want to replace (0000000000030D40). If you select "find all instances" when searching, it will highlight all of the data you need to replace. If the leading 0s are throwing you off, replace an item like a consumable that starts with 40000000 or armor that starts with 10000000.
Replace the data with the ID for the item you want to replace (40000000000003E8).
Next is the quantity. If you look to the right of the data you just replaced you will see 00000001. The last two digits is the quantity. Using the hex calculator enter the amount you want. For this example I will add 50 titanite shards in place of the shortsword. So I will change the quantity to 00000032.
The entire changed code looks like this now : 40000000000003E800000032
5. Fixing the checksum
After you have made your changes, you need to fix the checksum
A. With the edited user_data file loaded and bookmarks open, scroll to the very bottom of the file and you should see a bookmark for the checksum.
B. Click Edit > Select all (CTRL+A)
C. While holding shift, de-select the data in the checksum bookmark.
D. With all data highlighted EXCEPT the checksum click Tools > Generate Checksum. Select MD5(128bit), and make sure the radio button for selection is checked. Click generate.
E. In the lower right side of hex workshop you should see the Checksum Results window. Right click the entry here and select copy.
F. Highlight the data in the checksum bookmark and right-click paste.
G. Save the file
6. Getting the data back into your save.
A. In horizon, open the DRAK005 file from your hard drive (same as 1-b) and click the contents tab.
B. Right-click the user_data file and select replace. Browse for the file you edited and replace the one in the save.
C. Click the Save,Rehash, and sign button in Horizon.
D. Transfer it back to your stick and hope for the best
If you encounter errors when replacing your userdata file, when transferring to USB, or when loading the game, try again.