Requires workflow and bcms and their prerequisites. Option 1: use a custom tarball which includes those modules. In that case, the custom tarball will have a file install.xml in its root directory, so that installing OpenACS normally will produce a simulation server. Option 2: Install acs-core, and then rely on the automated install to do the rest. Go to /acs-admin/install/install and install simulation. The rest should happen automatically.