Client-Install:
Just use DZSALauncher

Server-Install:
1. Copy the mod folder in your DayZ-Server directory
2. Rename it to @WinterGear
3. Make sure you copy the bikey from the keys folder inside the mod
and paste it inside your DayZServer/Keys folder
4. Edit the start-parameter of the start.bat or dayzsetting.xml
5. Add "-mod=@WinterGear" to the start-parameters
6. If you use multiple mods make sure you seperate the mods with ";"
7. Should look like this > "-mod=@WinterGear;@Winter_Chernarus;@Mod3;@ModEtc"

Now add the item-spawns:
8. Open the types.xml in the mod folder
9. Copy everything
10. Open the types.xml in your server inside DayZServer/mpmissions/MAPNAME/db
11. Scroll to the end of the document
12. Paste it after the last type-entry but before </types>
13. Should look like this: https://imgur.com/a/ojZ4xK2