I did it. I was desperate, and it worked. The basic idea here is to convert your ps3 save to an xbox save, edit that save using Gibbed Save Editor, and convert it back to a ps3 save. Don't worry, it's extremely easy. You won't need to hex edit anything. In this tutorial I will be editing a manual save from the game. Everything in the editor should work. I changed the tutorial AGAIN and made it even easier. There shouldn't be any problems with corrupt data. As always, make sure to CREATE A BACK UP OF YOUR ORIGINAL DATA. ^-^
Pictures:
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http://i.imgur.com/B1FmZ9e.jpg
http://i.imgur.com/77VkwTl.jpg
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Things You Will Need (all of it is free):
-GIBBED SAVE EDITOR (http://svn.gib.me/builds/masseffect3/) (At the bottom that says "saveedit-r89_b114.zip")
-BRUTEFORCE SAVE DATA (http://www.aldostools.org/ps3tools.html)
-WINRAR (http://www.rarlab.com/download.htm)
-YOUR MASS EFFECT 3 SAVE (On Your PS3 of course)
-USB FLASH DRIVE
-You will need to unhide extentions for known file types, to do this on windows, open explorer, Go to Organize > Folder and Search Options > View > and make sure "Hide extensions for known file types" is UNCHECKED.
1.) Copy your Mass Effect 3 save data from your PS3 to your usb. Plug the usb into your PC and copy the save file (It is located in PS3/SAVEDATA/) to your PC, Somewhere you'll remember. I made a folder called "PS3 Saves". Make sure you create a backup of your save file in case anything goes wrong.I made a backup copy in a folder called "PS3 Originals".
2.) Download and install WINRAR on your PC if you don't have it. Download GIBBED save editor, and extract the folder to your desktop.
3.) Download BruteForce Save Data and install it on your PC. Once installed, start up BruteForce Save Data. It will ask you to enter your ps3 id and such, skip that for now. First thing you'll want to do is look for an option at the top called "path for SAVEDATA Folders". The default path is "C:\Program Files\Bruteforce Save Data\" But you should change it to wherever you copied your Mass Effect 3 save file on your pc. (Change it by clicking the "..." on the right side.) Next, click refresh, and your Mass Effect 3 save should pop up. Right above the save data in BruteForce, you will see in small writing "Profile (with random characters)". Right-click on it and select "Use Current PARAM.SFO" It will tell you to enter a friendly name. You may enter whatever you like and press "OK".
4.) In the bottom left corner, you should see various files from your ME3 save. select the save you wish to edit. It should say something like "SAVE0001" the numbers at the end will depend on which save it is. For this tutorial I will use "SAVE0001" When your desired save is highlighted, right-click on it and select "Decrypt PFD". You have now decrypted your save.
5.) Now open the folder with your decrypted save, and rename it to an xbox save file. To do this, simply add ".xbsav" to the end of the save name. Example: Rename "SAVE0001" to "SAVE0001.xbsav". After you rename the file, open Gibbed save editor.
6.) In Gibbed save editor, select "open" at the top and choose the xbox sav file. Edit it to your liking. If you're looking for armor, it is located in "Plot > Mass Effect 3 > Armor > Flag". Checking the "debug" box will give you the N7 hoodie, Shepard's romance clothing, and more. If you want your Shepard to have those awesome illusive man eyes, Player > Appearance > Presets > Open from file > Presets > Eye.
7.) When you're finished, select "save" at the top, and now you're going to overwrite the xbox sav file and exit Gibbed. After that, you must rename your xbox save file back to normal. Example: "SAVE0001.xbsav" should be renamed to "SAVE0001".
8.) Now go back to BruteForce and click the "refresh" button at the top right. Click on your SAVE file you were editing (in the bottom left box) to highlight it, then right-click and select "Encrypt PFD". Go back to the top of BruteForce, and right-click on the Mass Effect 3 save file, select "Rebuild with current profile (Partial). Select "yes".
And there you have it. Close Bruteforce, copy the save folder to your ps3 via usb. Make sure you load the save you edited. In my case, SAVE0001 I haven't tried this with ME2 or ME1 but I'm pretty sure that it works the same way. :p
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How to import ME1 and ME2 choices into a new ME3 save file: (This is a short tutorial, assuming you read the one above and know how to use the tools already)
1.) First start a new game, as soon as the game is finished Auto-saving, (After the boy is playing with a Normandy toy,) quit your game and copy the save file from your ps3 to your usb.
2.) Decrypt your game save with BruteForce, and rename "AUTO" to "AUTO.xbsav".
3.) Open up "AUTO.xbsav" in gibbed editor, and edit it however you wish. You can choose events that happened in Plot > Mass Effect 1, and 2. When you're done, overwrite your save and then rename "AUTO.xbsav" to "AUTO". (No extensions)
4.) Encrypt your game save with BruteForce, and copy it to your ps3.
5.) Load the auto-save in mass effect 3 and it will start from the very beginning, with all of the choices you selected in Gibbed editor.