http://www.irongeek.com/i.php?page=security/vistasamcrack ophcrack.sourceforge.net http://lifehacker.com/software/password-recovery/screenshot-tour-how-to-crack-a-windows-password-with-ophcrack-live-cd-232963.php
If your virtual machine can access the network (e.g. Bridge/NAT) then you can Map a network share:
net use y: \student-pc4\cdrom /user:testshare (password must not be blank)
Or if your DNS isn't ready net use: y: \10.0.0.13\cdrom /user:testshare
http://2tap.com/2007/04/22/sharing-files-between-a-windows-guest-and-ubuntu-host-using-vmware-and-samba/