http://blogs.technet.com/dhitchen/archive/2007/10/01/softgrid-sequencer-real-or-virtual-workstation.aspxThe sequencer can be a real machine or a virtual machine; commonly, virtual machines are used for the following reasons:- They can be reverted back to a known consistent state via undo or simple file copy routines. They can be manipulated via scriptsen-USCommunityServer 2.1 SP1 (Build: 61025.2)