The bad news is: you have to compile the source, unfortunately.
The good news is the box uses a debian linux and so it’s not that painfull.
If I remember right, the box is able from scratch to compile, but to be sure read about the necessary libaries.
Then you can compile by downloading the source to “/” then untar to a new folder and use “make” I guess to produce the binary. All necessary libaries etc. are copied to the right place by the compiler.
As far as I consider, you can use then the dlna - maybe make sure its startet at boot.
Basicaly I suggest to read some articles about compiling - good source @ubuntu as this is based on debian as well.
I think I used the following: http://wiki.ubuntuusers.de/MiniDLNA
good luck