Counter-Strike: Condition Zero hands for Half-Life: Opposing Force's Weapons.
It uses the def texture but sized up to 512x510 so it will work with most CS:CZ hand skins. Feel free to use this in your mod.
Get the normal HL weapons (HD) Here: http://hl.gamebanana.com/skins/142248
Get the normal HL weapons (LD) Here: http://hl.gamebanana.com/skins/142251