They don't require a monster-sized rocket, but the Mars for Less addons work in 2010 and should be worth a look.
[ame="http://www.orbithangar.com/searchid.php?ID=3248"]Mars For Less V1.6[/ame]
[ame="http://www.orbithangar.com/searchid.php?ID=3545"]Mars for Less extra[/ame]