The following article will cover the steps needed to change your map on your DayZ Server Hosted By Host Havoc.
1. Log into your game panel.
2. Stop your service if it is running.
3. Click on in your game panel and then click on for the serverDZ_By_HostHavoc.cfg file.
4. Locate the template="dayzOffline.chernarusplus";
section and change it to dayzOffline.chernarusplus
to the map name and then click on