What was the role of Dennis Tito during his flight to space?

Dennis Anthony Tito (born August 8, 1940) is an American engineer and entrepreneur, most widely known as the first space tourist to fund his own trip into space. In mid-2001, he spent nearly eight days in orbit as a crew member of ISS EP-1, a visiting mission to the International Space Station. This mission was launched by the spacecraft Soyuz TM-32 and was landed by Soyuz TM-31.

In February 2013, Tito announced his intention to send a privately financed spaceflight to Mars by 2018, stating that the technology is already in place and that the issues that need to be overcome are only the requirements of the rigor of a 501-day trip on a psychological and physical level for the human crew. However, in November 2013, Tito and other Mars Inspiration team members admitted that their plan was impossible without significant levels of assistance and funding from NASA.