i need you help pleas

[huntercodex]

Hello friends RAGEZONE, today I come to ask for help or at least a guide on how to change the images or add new weapons such as the Following picture:

I have it like this:



but I want it to look like this:



could you help me how to extract an image from either weapon or armor?

beforehand I thank you for your help and atension


PD: sorry for my bad English

[MentaL]