Texturing items in first person view.

[kouriichi]

I want a special 9mm pistol, and i want it to have a rusty, worn look to it.

But im not sure how to retexture it for firstperson view.

Something tells me its eather something horribly simple, or horribly complex, but which im not sure.

 

Is changing the firstperson veiw texture something i can do in the GECK, or do i need a completely different program for it?