Also, if you're using a NAS like I do, and if you have lock down it's file permissions like I have, you may need to manually create the ram folder else the RAM disk will not work.
Minor things which I hope to address in U8, where it will do some basic file checks to ensure the RAM storage is properly created, and of course the Web UI to copy files and playlists over.
Before you do any listening audition - make sure RAM storage is working first. To check, simply reset your computer and look in the RAM folder again. If the copied files are gone, then it's working. Otherwise, something is amiss.
You can comment on RAM disk here.