Installation
1. Install OpenIV if you don't already have it
2. Run OpenIV
3. Create mods folder
4. Then mods>update>x64>dlcpacks paste the custom_maps folder here
5. Then mods>update>update.rpf>common>data enable edit mode and right click on dlclist.xml and select edit
6. At the very bottom, add a new line  <Item>dlcpacks:/custom_maps/</Item>
7. And you have installed custom maps now go to "ymap installation" file