Can I Non Techie Do This?
Ning To Jamroom
yup, you got it. The jrNingja skin has a check built into it "If Site builder is all active, show it, if not show the default layout."
--edit--
The difference between a standard template and the Site Builder system is where the code is stored.
In the traditional system users edit the code in the skin .tpl files to create their custom Jamroom layouts and skins. With this method, to get a list, you use the {jrCore_list ...} function in the template you want the list.
With Site Builder, the code for the templates is stored in the datastore, so the skin just has the outter layout, then that big box in the middle where all the content is is just a blank pad. You add a layout to that, then add widgets to the layout. But if you view the .tpl code for that section in the skins all you will see is:
{jrPanel_display name="index"}
That one line of code is the panels activating. It says "Go and check the database for this page and see if any widgets have been added here, if there are some, show them.".
Its un-related to the code you have in the /skins/ directory. So your site will be blank when the system is just started because nothing has been added.
--edit edit--
Turn it on, try it out, if things get weird, let me know and I'll help you get setup.
updated by @michael: 01/20/15 09:45:28PM