I simply installed Twonky on Ubuntu server. Setup where to find my audio and the Xbox 360 automatically finds it all when you go "Music - (X) Change Music Source - PVConnect".
With regards to VOBs. I dont think the 360 can play them. However, other media devices may be able to.
If you run Linux, you may wish to consider using DVD::RIP to convert your VOBs to xvid or something smaller