Skinbox Support Forums
How to install a skin on IP.Board 3.3.x
After downloading/purchasing your skin, browse through the folder until you find your skin files, which will look like the following:
Login to your forums admin control panel, and choose "Import/Export" from the "Look & Feel" menu.
Next to the "Upload XML(Archive) Skin Set" field, browse for your skin.xml.gz file. You can optionally specify a custom name for the skin under "New Skin Set Name". Click "Import Skin Set".
Next, scroll down to "Import Image Set". Browse for the images-skin.xml.gz file. Once again, you can optionally set a custom folder name for the images. If so, do not enter spaces in the folder name. "Skin images" will create errors. Instead, use something like "skin_images". Next to the "Apply To Skin Set" field, select the skin you imported in the previous step. This will assign your template files and images together.
Next, choose "Edit Settings" from the drop down menu next to your skin.
To make your skin default and available to all members, make sure your page looks something like this (take particular notice of "Select ALL current and future groups or...", "Make this the default skin?" and "Hide this skin from the drop down list?").
Press "Save Set" and your skin will be installed and ready to go!
We hope you enjoy the new design!
http://www.skinbox.net