Hello, and welcome to the spell swapping guide for 3.x. Lets get started with what you will need to do this.
Glitchy's MES:
http://www.mmowned.com/forums/model-...tchys-mes.html
Mywarcraftstudio:
MyWarCraftStudio.rar
That is all we will need for this tutorial.
Step one: Install Glitchy's MES
Step two: Make a new folder on your desktop and name it something like "Model editing DBC files" or something of the sort.
Step three: Open up MyWarcraftStudio
Step four: In MWS go to File > Open MPQ Archive.
Steo five: Go to your World of Warcraft Data folder and then inside should be another folder named "enUS". Open that folder and inside Open the file named "patch-enUS-2.MPQ".
Step six: Click on DBFilesClient and you should see a bunch of DBC files. NOTE: If you do not see DBFilesClient, at the bottom on the left you should see a drop down box, click on it and click ALL FILES (this displays what type of files to show)
Step seven: Click on the following one by one and right click on them, then Extract file to... and save these in your "Model editing DBC files" folder (the folder you put on your desktop).
CreatureDisplayInfo.dbc
CreatureDisplayInfoExtra.dbc
Spell.dbc
SpellVisual.dbc
NOTE: you may need to only copy spell.dbc and spellvisual.dbc but i did all of them to be sure.
Step eight: Take those files in the folder on your desktop and copy them into the folder int he Glitchy's MES data\DBC folder. For me this is located at C:\Program Files\Glitchy's Model Editing Suite\data\DBC, so just find where you installed the program and inside the folder is a data folder with the DBC folder. When it asks you to overwrite old files, click YES.
Step nine: Open up Glitchy's MES and go to advanced tools (all the way on the right at the top) and you should get a drop down list. Click on Spell swapper.
Step ten: Click LOAD DBC, after that choose to where you would like to save the MPQ file (i just pick a new patch number and save it under the world of warcraft data folder so I do not need to move it when I am done).
Step eleven: Go to the website
WOWDB:The next generation World of Warcraft database and type in the spell you are currently using and want to change in the search. On the next page you will get items, abilites etc... in tabs. Choose abilites. You should see different ranks of your spell you want to change now. BE SURE TO CHOOSE THE RIGHT RANK and click on it. Now on the next page at the very top in the address you may get this spell's ID at the very end of the address line. It will be spellid=spellidnumber. Step twelve: Do exactly the same thing you did in step eleven, except get the spell ID of the spell you want to swap to, so if your switching from fel armor to shadow form, look up shadow form. and copy that ID down as well.
Step thirteen: Now in Glitchy's MES, You have 2 boxes at the bottom of window, one for the spell you currently have and one for the spell you want to swap to. Enter the ID's in the right box and click SWAP. Then click save at the bottom.
You may now use a model edit fix to log in and your spells have been swapped

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Also, when spell swapping after your first time (as long as there isn't a new patch) you may just open Glitchy's MES and swap that way. No need to use MyWarcraftStudio every time you swap 1 spell. That process was to just update the DBC's in Glitchy's MES for easy swapping

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I will try to update this post with pics soon. If you have any questions, please post here and I will try to assist you.