DLNA: How to play the contents of ALL subdirectories

Hi there,

I have a CR-N755 that can stream music.
It's working fine, but when navigating on the network, I cannot
have the unit select a parent directory and play all the subdirectories.

for example, suppose I have the following directory structure:

D:\Beatles\album1
D:\Beatles\album2
D:\Beatles\album3 etc

How could I tell the unit to play all the content of the "Beatles" directory ?

I know I can get it to work by making a playlist on the PC...but it's tedious to do it everytime.