#17 - Oct. 7, 2006, 8:12 p.m.
Once and for all, Herokorishi, modifying or otherwise editing in-game models (save for those related to one's user interface) is strictly prohibited by the Terms of Use (Section 2.C.), and may result in repercussions up to and including the termination of the account in question. Note the bold:
Q u o t e:
You agree that you will not (i) modify or cause to be modified any files that are a part of a World of Warcraft installation; (ii) create or use cheats, "mods", and/or hacks, or any other third-party software designed to modify the World of Warcraft experience; (iii) use any third-party software that intercepts, "mines", or otherwise collects information from or through World of Warcraft; or (iv) allows players who are playing characters aligned with the "Alliance" faction to chat or otherwise communicate directly with players who are playing characters aligned with the "Horde" faction, or vice versa. Notwithstanding the foregoing, you may update World of Warcraft with authorized patches and updates distributed by Blizzard, and use authorized Third Party User Interfaces as set forth in Section 13(g), below.
The End User License Agreement (Section 4.A.) also has this to say on the subject of editing the files bundled with the game client:
Q u o t e:
Subject to the license granted hereunder, you may not, in whole or in part, copy, photocopy, reproduce, translate, reverse engineer, derive source code from, modify, disassemble, decompile, or create derivative works based on the Game, or remove any proprietary notices or labels on the Game. Failure to comply with the restrictions and limitations contained in this Section 4 shall result in the immediate, automatic termination of the license granted hereunder and may subject you to civil and/or criminal liability. Notwithstanding the foregoing, you may make one (1) copy of the Game Client and the Manuals for archival purposes only.
In short, you may not change any in-game models, regardless of how minor a change you may believe it to be. My apologies, friend.