1) You will need photoshop : http://www.click-now.net/cgi-bin/download.pl?file=0722

2) You will need the mrs unpacker/packer so you can access the .dds files you will be editing can be found here: http://www.mediafire.com/?dymyily3yxd

It is a .rar file everyone has a rar unpacker but if you dont download:
http://www.rarlab.com/rar/wrar371.exe

3) Move the files to your desktop or a folder you can access quickly.


4) When you have your photoshop, you will notice that your computer doesn't know what a .dds file is, uh oh, download the Photoshop .DDS plugin:nVidia Photoshop Plugin http://developer.download.nvidia.com/tools/texturetools/Photoshop_Plugins_8.23.0307.1915.exe


5) Now you can successfully open a .DDS file in photoshop and edit it!
a) Another optional thing to speed up editing is to download a identifier thing that lets you see the .dds file in thumbnail form while still in a explorer window, this is good because you don't have to open 30+ files just to find that t-shirt you wanted!
Download: nVidia Identifier
http://download.nvidia.com/developer/NVTextureSuite/DDS_viewer.exe
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If you want more in depth tutorial. follow this tutorial!

REMEMBER
Backup ALL edited files!!!

1) You have downloaded all of the above and run the exe with the plugins, this tutorial we will be opening man.mrs located in wherever Atlas GunZ is installed/model/man.mrs. COPY it into the same directory as mrs.exe and cmd.exe, now run cmd.exe and type mrs.exe and the press your enter key some text will appear under the line you wrote this is instructional showing the 2 commands u can use with mrs.exe



Now you have cmd open type mrs.exe d man.mrs, this will decompile the mrs.exe right in front of your eyes!


Now you have a man folder and a man.mrs, open the man folder (you can close down cmd.exe now if you want) right click the file and open it with photoshop!


You should see this small menu, make sure it looks the same as the screenshot shown.



You can edit it freely from their, also as you can see from the screenie I have been busycannabis jacket


Once you have finished editing you need to know how to save correctly right?
File>Save As>Pick your location and you should get another little gui, use the same options as shown in the folowing screenshot!


You might get a popup saying alpha information will be lost -just click ok, ok?
Remember to save it as the same name as the original file you edited!
Right now you need to pack the man folder we have edited first delete the man.mrs that you copied NOT THE ORIGINAL IN YOUR GUNZ DIRECTORY and rename the one in gunz directory to unedited.mrs!

Now open that cmd.exe again and type mrs.exe c man, this will compile/compress the file to the name man.mrs, now stick it in your model folder inside the gunz directory and you should be done
the clothes you edited will overwrite the original ones in game!

You will be able to see it ingame







For those who want to edit weapons/items/portals/grenades and that stuff, its exactly the same as cloths but you must decompress the model.mrs instead!

Be warned some weapons are more complicated to edit than others!

Code:

Credits to Kempy for his great Tutorial.