I haven't heard about that one, but unless I'm missing something, it'd be a suicide mission.
Simply put, it'd be virtually impossible to transport enough equipment to sustain four people for two years on Mars. They'd need tons of equipment- literally- and a huge amount of food and water. We're talking at a minimum, eight to ten full shuttle loads, in addition to the colonists.
If- and it's still a big if- they managed to find water on Mars (most likely water ice, at the poles or deep in a crater) they could make oxygen, but barring that, they'd have to carry tons of liquid oxygen just to survive.
The only logical scenario is the old lunar colony idea- launch rocket after rocket (unmanned) to deposit dozens of cargo containers in the target area. Containers holding portable shelters, stored oxygen, preserved food, tools, mining equipment, radios, etc.
Then launch the manned mission, equipped with enough gear aboard for several days or a week or more of sustained effort. They land, they unpack the containers, assemble shelters, set up the radio stations and solar panels, etc.
It could be done, but again, it'd be fabulously expensive- on the order of tens of billions per container, and the colonists would need dozens of them.
We'd be better off spending that cash trying to develop one of the aforementioned 'reactionless' or fusion drives or something.
