Do you spoof on LAN only/Battle.net/or Garena?
If you use Garena follow this guide by me
[Tut]Name Spoofing In Garena - 1st-HACKS | Developing and Gaming Community
If you use LAN then here it is...
Download Cheat Engine 5.5
open it then target warcraft 3 TFT
search for text and put your current name in warcraft 3 TFT
search for that name in Cheat Engine
High light all Address results then click on the arrow on the lower right of your results
press ctrl+a to high light all
right click->change record->value
put in your desired spoof name!
click ok until your done
That's about it, you don't need any spoofers such as SF's but you better save your changes so the next time you want to spoof back your name its a lot easy
If you use Battle.net I don't know if this will work, But If you find my post useless SHUT UP! Thanks