How to make yourself an admin:

Step 1: Log into your Host Havoc game panel.

Step 2: Click on "Configuration Files".

Step 3: To the right of Command.dat, click "Configuration Editor".

Step 4: In the section Owner GUID, put your Steam64 ID. If you're unsure of your Steam64 ID you can find it here: steamid.io/lookup)

Step 5: Enable Cheats

Step 6: Save the file.

 

If you have installed Rocket, you can complete the following steps: 
Step 1: Log into your Host Havoc game panel.

Step 2: Click on "Configuration Files".

Step 3: To the right of Permissions.config.xml, click "Text Editor".

Step 4: You will need to add a section like this (Please keep in mind that you will not need all of the listed permissions): 

<Group>
<Id>Admin</Id>
<DisplayName>Admin</DisplayName>
<Color>13DB0C</Color>
<Members>
<Member>7656XXXXXXXXXXXXX</Member>
<Member>7656XXXXXXXXXXXXX</Member>
</Members>
<ParentGroup>default</ParentGroup>
<Permissions>
<Permission>wreck</Permission>
<Permission>w</Permission>
<Permission>listvehicles</Permission>
<Permission>Admin</Permission>
<Permission>Admins</Permission>
<Permission>Decay</Permission>
<Permission>Give</Permission>
<Permission>Mode</Permission>
<Permission>Day</Permission>
<Permission>Night</Permission>
<Permission>Save</Permission>
<Permission>Time</Permission>
<Permission>Unadmin</Permission>
<Permission>Bans</Permission>
<Permission>callvote.day</Permission>
<Permission>p2p.noblock</Permission>
<Permission>investigate</Permission>
</Permissions>
</Group>

Step 5: On the line that contains <Member>, replace this SteamId with your own.

Step 6: Save the file.