Just a note that version 2 is now up and available for purchase and download!
New Features: Admin Configurable, Enable/Disable skinswapping, Swap by custom variable or Store Lanague or Affiliate partner ID, Default skin to choose if none is specified (Fallback method), Easily switch between debug_templates.tpl and debug.tpl while Debug Console is enabled, Skin repository directory to hold all skins that are swapable.
http://www.cart-lab.com/