To choose a skin for your site, go to 'Regional Setup
> Lang & Email Setup' and choose which language
you want to set the skin for. In the form that opens, you can the skin
from the 'theme' menu. If there are multiple masterpages in the skin,
you can choose one of those too.
If you leave either selection blank, Kartris will use the defaults
(which are the skin 'Kartris' and the
'Template.master' template
file).
This menu automatically picks up any new
folders added to the /Skins folder within a Kartris
site. So all you have to do to import or create a new skin is to place
the new folder there and then select it from this menu.