The reason your dvd volume is so low is because DVD audio is AC3 audio. You need to go into control panel, AC3 settings and tweak the master volume up a bit. I normally tweak mine up 10dB or so. Also, klite codec packs are great for heaps of xvid, divx movies etc, but will not help you as a DVD decoder. on the Codec pack front I personally have found DefilerPak to be superior to the k-lite codecs.