In XP's device manager use the "don't use this device" setting.
An example (sorry, varies with the view in the OS)
hi all. i want to install an external sound card to my laptop but i need to disable the internal one first. i've been told to disable the sound in the BIOS. i have checked the BIOS but i dont have any option to do with sound. is there any other way i can disable all the sound without going through BIOS???
thanks in advance