This is NOT my work. I have just uploaded it to OH so that it can still be downloaded after the hack of AVSIM.
The description from the website:
This addon will add the majority of our Solar System's moons to Orbiter. As well, the Gas-Giants get a makeover with atmospheres and cloud layers
Original Authors:
VF2_Rolf, Chode, Tony, Hot Dog + many others.
For more information, look here:
http://www.geocities.com/fastheinz39/Saturns_Moons.html