1. Upload the contents of the upload directory to the root of your XenForo installation.
2. Go into your XenForo Admin Control Panel, click on Styles, and then click on
"Import a Style" in the left-hand navigation list.
3. Click on the upload file field, and then navigate to and select the style-Minecraft.xml
ENJOY YOUR NEW STYLE!
but i dont know how to do 1. but i did 2. and 3. i just dont know how to do 1.