Edit: I would like to add that the patch available at the download location listed below also enhances the breast size of female characters (as well as NPC's) in the game that use the 8 *female.m2 model structure files, where * is the characters race.
In order to do this, you need to download an executable file called "WoW.exe" and replace your original "WoW.exe" file with the new one you'll be downloading. You can find it packaged with the nude patch which you can find here --->http://azerothica.com/downloads/wownudepatch
The purpose of this file is to keep WoW from checking for updates when you run it. If you do not do this, the launcher will "update" your .MPQ files and remove them. The second step is the naming convention. If you look in your World of Warcraft/Data folder, you should see a few .MPQ files, one of which is called patch-base-15051. When you rename your patches, you need to use names like "wow-update-base-15054" or "wow-update-base-15053" or they won't be read by the game. I'm currently using wow-update-base-15051 through 15054 with no problems. You don't have to use the patch that's in the link above, but those files have the WoW.exe packaged with them. The instructions are also in the .zip file you will download. Some patches may not work, or cause the game to crash. This is because they have changed the location of certain files inside the .MPQ's for their own reasons. To get around this, I'm slowly going through these outdated patches with MyWarcraftStudio and updating them to work with the main "art.MPQ" file. I've had some success but it's a very slow process. I will, or course, upload the fruits of my labor if I ever finish it. At the moment, I have a few NPC's, a few statues, and all of the playable races in "nude-mode". If you have any trouble I'm not sure I can help, since I only figured out everything I know in the past 24 hours. I will check back though and if I think of anything else to edit in here, I'll do so.
P.S. I apologize if this is posted in the wrong spot, but it seemed like this post could have used a new area as opposed to being attached to an outdated post. If it's requested that I move it I'd be happy too. Just let me know...or it could be made a STICKY if everyone feels like it's a decent write-up.