The Sound folder is taken from the 'Quiet Feet' mod, and disables rat footsteps. If you don't uninstall it correctly before removing the.
In console, and do what the messagebox says. Gecko takes about 500kb, and saves you the hassle of having to download 50 megabytes of silence. In order for the dialogue in the mod to be readable, you need to install Tes4Gecko and use its 'Generate Silent Voices' option on this. This mod requires OBSE to work (version 0015a or higher.
Make sure you load this mod as recently as possible, or you might get some strange dialogue options. Any vampire saves you have will make the transition from vanilla vampire to Nekhanimal's awesome ones, though you might have to feed once in order to get all the new abilities.
esp in your Data folder and load a game or start a new one. The old thread reached its post limit, and the mod reached a new version, so here we go again!
