Hi, I wanted to write to you to let you know that I've successfully ran the contest referred to in the email subject using CMS, with absolutely no problem at all. The setup for only 16 contestants was one instance of everything, except for two workers. All services ran on VirtualBox virtual machines, working flawlessly by following installation instructions in the guest operating system (Xubuntu 12.04 32 bits), with guest additions installed. Thank you for all the development effort! Agustín