Disabling Sounds Card Using Regedit for WinXP

Any information on doing this would be greatly appreciated because Im pulling my hair out with this one.

Im trying to find a way to Disable Sound Cards on Win XP machines using Regedit. Im trying to do this on a network wide scale so I need to use the regedit function of XP.

Also is there an option to disable Windows Media player using this same method?