I am afraid to say that Connectix's Virtual PC was purchased by Microsoft earlier this year.
Microsoft were keen to 'develop' the mac side of their range apparently! Hmm.
http://www.microsoft.com/mac/products/virtualpc/virtualpc.aspx?pid=virtualpc
I am considering buying it but its quite expensive.
Thanks for everyone's help. It nice to be in the presence of Mac loving Star Wars fans!