Go to Pelican Parts and read the DIY on how to do the service. You will need 9 liters of of ATF fluid, the kit, torque wrench, Torx sockets and a digital in-fared thermometer. You will need to put your boxster on stands and be sure it's fairly level. Good Luck...I did mine and it took about 2 1/2 hours.
The pan is the easiest part.....