The XP CD doesn't have the LSI drivers so you'll have to copy the driver floppy image to the host and then press F6 during the install to add the drivers. See the first link for doing this with LSI drivers. The 2nd link has the same but for the Bus Logic controller. The last link has a great program which you can use to integrate the drivers onto the install CD.

LSI drivers and install - http://virtrix.blogspot.com/2007/09/vmware-installing-windows-xp-on-esx.html

http://www.vmware.com/community/thread.jspa?threadID=84832&messageID=646121#646121

http://www.nliteos.com/