strickly speaking other sw also works with the BS5e; f.e. the Windows Media Player, iTunes, Plex and XBMC.
I have Twonky installed on my NAS because the DLNA server of the NAS didn't always displayed covers.
How to install Twonky on your NAS. this depends strongly on your NAS. For some type Synology/Netgear/QNAP you can download a package to install (see forums, sites). This is handled directly through the setup sw of the NAS.
For others it is directly installing on the NAS using SSH or Putty (on respectively Mac or PC). Because most NAS's work on Linux, some knowlegde of Linux is adviced and also the courage to do it.
for Twonky-NAS software see: http://www.twonkyforum.com/downloads/6.0.37/
TIP: do you have an old PC: install Ubuntu on it (it's for free) and install Twonky (it's licenced thus not for free), add additional storage and you have a smooth running NAS