to see demo go Here and in the bottom select “Minecraft Cube Game – Mybb 1.6.5 – Saluxjiras.it -theme”
Minecraft Cube Game – Mybb 1.6.5 – Saluxjiras.it -theme
1- copy minecube folder to the image folder of mybb installation.
2- upload the xml file throught the ACP in the section -> themes > import Theme> upload file
theme by http://saluxjiras.it (if u love this theme please take a tour on saluxjiras.it and comment on the theme page thanks :D)