I have been trying to install the new SharePoint Training Kit on my MOSS 2007 server.
I followed the instructions and at the last step found that when I tried to Activate the feature on the training site, I received a 'language is not supported' error. I am in Australia so the OS was set to English (Australia) as the language.
So I reverted my VM to a previous snapshot and tried again having changed the OS language setting to English (United States). Again I got to the last step and was disappointed to see the same message.
After more testing, I thought to change the Regional Settings for my SharePoint Site that I created for the training from English (Australia) to English (United states), and that allowed me to activate the feature.
It is a great idea to publish the training this way and I'm looking forward to investigating it in a bit more detail.