Ok, I received my new Hard Drive, WD 160GB IDE, installed the thing along with the old Seagate 80GB that was already in there. I made the WD the master and the Seagate the slave. Once that was done, I installed Windows XP Professional onto the WD HD. Of course I inserted the Resource CD and installed those, then went and installed my Small Business and the Anti-Virus software w/ firewall. The MOBO for the Dell 4600 that I own made the Master Drive "C:" and the Slave "D:" and everything is going fine.