We recently renewed our subscription service. Due to financial circumstances, we converted one network seat to a standalone seat. This left us with two users and only one network seat. We want to install the standalone seat (SW2009) and the network seat (SW 2010) on the same machine. Can we install both version on a single drive? If not, would it work to install one version on one drive and the other version on another internal drive? These would be SATA drives. If that is necessary, would we need to make the machine a dual boot? Thanks for any imput.