PowerEdge 400SC Sound Driver for Windows XP Pro

I recently purchased this computer (PowerEdge 400SC) from a friend who never used it.  Unfortunately he can not locate his Dell disk(s) that came with it.  I accidentally removed the sound driver last night, and need to locate the correct driver to reinstall.  Trying to track this down is like reading Chinese between dell's and Intels sites.

 

Can someone please tell me where I can locate software to install to get my sound back?  It was working great under XP Pro by the way.

 

Thanks,

 

Ben