The RS Planet rocket boosters are use to bring the space shuttle up into the rocket. The 3rd genaration has 2 mini rocket boosters to add with the rocket. As you see from the right, the rocket boosters fall from LBP-1. Also thier are mini decarations on the rocket boosters.
On 14 March 2011, The rocket boosters will be sent to PYRO_MAINIAC45's new museum the next day.