In all <weapon name>.txt files you must define
the number of lines at the start of your script.
(Half-Life requirement)

Usage:
<number of lines>
<command> <screen resolution x> <sprite name> <x> <y> <width> <height>
<command> <screen resolution x> <sprite name> <x> <y> <width> <height>
<command> <screen resolution x> <sprite name> <x> <y> <width> <height>
...

Possible commands are:
crosshair		// Normal crosshair
autoaim			// Autoaim
zoom			// Zoom
zoom_autoaim		// Zoom + autoaim
weapon			// Weapon slot
weapon_s		// Selected weapon slot

Screen resolution:
<  640x480: '320'
>= 640x480: '640'

Sprite name:	real sprite name without path and extension
Coords X,Y:	top-left crop position
Width, height:	crop width and height

For example see the weapon_crossbow.txt