I am a student and just got Office 2004 Professional from my university. I installed the office disc, but do not fully understand what Virtual PC is. My understanding is that you put that on a mac, and are able to open PC programs on the Mac? That is as deep as my understanding goes. Is there anyone that can better explain it? Also, is this a necessary or recommended program? Would this be helpful if i have two computers, a PC and a Mac? Thanks for any information!