How do i install a addon to my server?

i know this is a newbie question but how do i install addons to my server so other people can see my master chief models, mario models samus models etc…
everyone just see it as a error, is it possible to fix? so everyone can see master chief and mario models without they need to install it by themself?

is this video showing right??
http://www.youtube.com/watch?v=SeCUyBvs56c

This is how:

& you’re in the wrong section

You can also use the Steam Workshop to mount server addons.

dammit i need to pay :confused:

Uh… pay for what?

ftp hosting :confused:

[editline]10th January 2013[/editline]

i don’t have a cache on my server :confused: so i can’t find the workshop id :confused: