Okay weird question and I'm pretty sure no one can answer this, but I am using Klexen's Knife Upgrade plugin
https://forums.alliedmods.net/showthread.php?t=243254 and I love the features, however I want to add something to that, I want people to get the opportunity to not only choose a different knife but also the custom skins for it so let's say you open up the knife menu by typing !knife in chat you'd get
1.Bayonet
2.Gut Knife
3.Karambit
4.Butterfly Knife
5.M9 Bayonet
6.Huntsman
After making one of the selection (for example bayonet) it opens another menu with
1.Bayonet Slaughter
2.Bayonet Fade
3.Bayonet Crimson Web
4.Bayonet Blue Steel
Etc. But I was wondering how does one get access to the custom skins? I've seen endless video's of people playing Non-Steam versions with every skin currently out including display items such as Finalist 2014 Katowice. So how do you get seperate files? Good example:
https://www.youtube.com/watch?v=fHd_gfgxkrY . Pretty sure all of those items were server sided and you need active internet to gain access to your own inventory otherwise I'd revert back to default skins, but somehow this guy or rather who made this non-steam version did get his hands on it.