Adding custom icon to SWEP

Garry's Mod coding
#1

Hi,
I want to add custom icon (when select wepon) but I don’t know how do it.

#2

http://www.facepunch.com/showthread.php?t=768724
It includes the swep spawn icon and the swep select icon.
Enjoy.

#3

It’s only how make Spawn icon, not select icon…

[EDIT]

I mean this:

http://www.bankfotek.pl/image/391469.jpeg