How do I set myself to Super Admin?

In order to set your rank in xAdmin 2, simply run the following command:

xadmin setgroup "STEAMID" "Super Admin"

Ensure that you are ingame when running this command, include the quotation marks around the SteamID, and that you use the correct SteamID (It should be formatted like this: STEAM_0:0:52189662 and can be obtained by simply typing "status" into your console).