Problem:
Supply gives the first item from "mp_supply_items" only.

Solution:
When you change mode of supply, it will be reseted with chosen mode and current health, however upgrade value will be lost.

At first I wanted to replace a standard supply with custom, but now I found this simple way.

You can use it as you want, it's too easy for me

Yeah, I had seen that. It works like that also.

actually, if u download the dedicated server files and run ur server on dedicated all the time, theres a fix in the dedicated server .exe that lets supplies work

My supply works perfectly fine, I fixed by transfering some files from my CS2D 1.1.9 to my CS2D 1.2.0. I check and compared the with one another. And I had no future problems. I don't lose sound, supply works, no loading problems, and so on. The only bad part is that my CS2D is now 800mb

Looks like a good fix, for now. I seriously can't believe no one thought about doing this.