This is the SSBfiles .xml layout
All you have to do is copy and paste into notepad, save as SSBfiles.xml, and put it in the riivolution folder.
Then, as explained in the
N00b guide (which is very handy, mind you), set up your files like this:
(X):\private\wii\app\RSB(X)\pf\Fighter\(Character Name)\
Replacing (Character Name) with the following (the file names on the right)
This is just fighters but the noob guide explains which directories where stages, music, etc. will fit in.