Getting ahead for this semester

I have been going to school for Network Administration for just over a year now, and we just ended the last semester where I covered XP Admin. In the new semester, we are going to get into db using MS Access and Server Administration using MS Server 2003. As such, I have decided to go ahead and create a virtual windows network on my home computer, which is of course linux. I am using Virtualbox (not OSE) with Guest Additions enabled for all applicable vboxes. I have 1 2003 Server and 3 XP machines. I installed xp on one vbox, and then simply copied the hdd for the other 2. I have changed my whole network to allow for a second subnet, and I am going to have the 3 xp machines ask for their ips from the windows server and manage that subnet that way.