yea, you need to put a "skins" folder in your modulesdir, then put a folder in it with the title of the skin (i.e. "default").

then, in your "default" folder, put the skin ini file and the graphics. the skin ini file defines the meters (specifics) and the rainmeter.ini file (in the modulesdir) defines the basic settings such as windowX and windowY.

this is a different setup than the older formats because it separates the ini into two parts instead of shoving it into one big one (which makes it easier to set up multiple configs).