Can I set up a windows server 2003 network using 2 virtual PCs?

Hi,

I'm preparing for a MCSA certification and for practice purposes I'd like to set up a small 2 PC network. The thing is that I only have one computer!!

Can I set up 2 virtual PCs both having windows server 2003 OS and set up a network between the 2 virtual PCs? Can set up one as domain controller and the other as client or child domain? Can I actually make them communicate with each other via the local network? Thanks