Mars For Less - by Mark Paton, Bruce Irving and Andy McSorley, including Crew Launch Vehicle by Antonio Maia - Simcosmos.
The Mars for Less (MFL) Reference Mission, developed by Grant Bonin, is basically Robert Zubrinâs Mars Direct architecture, but divided into smaller components that can be launched using today's medium lift launchers (MLLV, ~25 metric tonne payload) from a number of nations. For this project, Thomas Ruthâs freely available Ariane 5 launcher model for Orbiter by was used and modified for the purpose of launching the various spacecraft elements to LEO for assembly. The MFL spacecraft themselves, as well as a special modular upper stage, were developed specifically for this project (based on Vinkaâs spacecraft3.dll), and a number of other add-ons were also used to simulate various aspects of the MFL mission.
It is essential to carefully study the included documentation before installing and using this add-on.