Need help with a texture edit

[Tyohoon]

I was wondering if someone could help me shrink the sword on the Sasuke Uchiha v2 http://forums.kc-mm.com/Gallery/BrawlView.php#Type=Character%Marth% texture for Marth.  I want it to be the same size as marths if possible.  I would do it myself, but I'm pretty bad with this kind of thing and I really don't even know where to start.  I am willing to try however if someone can point me in the right direction.  Thanks in advance.