Are you using windows because of compatibilities issues? Well, forget about that..
VirtualBox OSE is a way in which you can run you windows apps or mac osx apps. Theres no reason to use windows because of word or IE, when you have open-office and firefox right?
VirturalBox OSE is a very good alternative to shitty XP mode or Microsoft virtual Machine; both are LIMITED to windows products. VB can run any OS if you have the installation CD or ISO