Hi,
AFAIK these kind of things are available but I will suggest you to use CBTs and for practice use the VMs because with VMs you can create and manage your own system and it will give you better edge for performing in real life.
Regards.
Shafaquat Ali.
M.C.I.T.P Exchange 2007/2010, M.C.I.T.P Windows Server 2008, M.C.T.S OCS Server 2007 R2, URL: http://blog.WhatDoUC.net Phone: +923008210320