Not sure you will find the drivers for XP on the DELL site, but you can find all the available downloads for the 4600 on support.dell.com. Just enter the service tag or choose by product type. The cd with the drivers will be the Installation and Server management CD.
Thanks Dennis, there is about 150 of them there, None are called Back plane Drives or Reference that error above, I have downloaded and installed as many of the likely posabilities I can find, none seem even close, the Errors remain in the device manager, I do not have any CD's with my machines, is there someplace I can download that CD? Do U have a copy if it?