How to edit a text in a weapon

Can someone help me how to edit the text like in this weapon picture, i wanna change into an indonesian language or some words in my own..

http://img585.imageshack.us/img585/3214/someonehelp.jpg

Thanks

Pretty sure its configs.pck\item_ext_desc.txt

correct me if im wrong somebody ^.^

thx, i'll try your solution :)